[
  {
    "title": "1 Statistical sampling",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_1.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_19.jpg_r2_c0.png"
      }
    ],
    "children": [
      {
        "title": "1.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_1.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_19.jpg_r2_c1.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "2 Data presentation and interpretation",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_2.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_3.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_4.jpg_r2_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_5.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_6.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_20.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_21.jpg_r1_c0.png"
      }
    ],
    "children": [
      {
        "title": "2.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_2.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_19.jpg_r3_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_2.jpg_r2_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_20.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_2.jpg_r3_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_20.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_2.jpg_r4_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_21.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_3.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.6",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_3.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.7",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_4.jpg_r2_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.8",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_5.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.9",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_5.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.10",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_5.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "2.11",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_6.jpg_r1_c1.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "3 Coordinate geometry in the (x, y) plane",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_7.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_22.jpg_r1_c0.png"
      }
    ],
    "children": [
      {
        "title": "3.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_6.jpg_r2_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_21.jpg_r2_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "3.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_6.jpg_r3_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_21.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "3.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_7.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_22.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "3.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_7.jpg_r2_c0.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "4 Statistical distributions",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_8.jpg_r2_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_23.jpg_r1_c0.png"
      }
    ],
    "children": [
      {
        "title": "4.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_7.jpg_r3_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_22.jpg_r2_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "4.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_8.jpg_r2_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_22.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "4.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_8.jpg_r3_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_23.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "4.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_8.jpg_r4_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "4.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_8.jpg_r5_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "4.6",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_8.jpg_r6_c0.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "5 Statistical hypothesis testing",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_9.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_10.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_24.jpg_r2_c0.png"
      }
    ],
    "children": [
      {
        "title": "5.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_9.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_23.jpg_r2_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_9.jpg_r2_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_24.jpg_r2_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_9.jpg_r3_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_24.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_9.jpg_r4_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_10.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.6",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_10.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.7",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_10.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.8",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_10.jpg_r4_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "5.9",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_10.jpg_r5_c0.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "6 Exponentials and logarithms",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_12.jpg_r2_c0.png"
      }
    ],
    "children": [
      {
        "title": "6.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_11.jpg_r1_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_24.jpg_r4_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "6.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_11.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "6.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_11.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "6.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_11.jpg_r4_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "6.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_11.jpg_r5_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "6.6",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_11.jpg_r6_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "6.7",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_12.jpg_r2_c1.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "7 Differentiation",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_13.jpg_r2_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_14.jpg_r1_c0.png"
      }
    ],
    "children": [
      {
        "title": "7.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_13.jpg_r2_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_25.jpg_r1_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_12.jpg_r3_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "7.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_13.jpg_r3_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_25.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "7.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_13.jpg_r5_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_25.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "7.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_14.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_25.jpg_r4_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "7.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_14.jpg_r2_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_25.jpg_r5_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "7.6",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_14.jpg_r3_c0.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "8 Forces and Newton's laws",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_15.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_16.jpg_r2_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_26.jpg_r1_c0.png"
      },
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_27.jpg_r1_c0.png"
      }
    ],
    "children": [
      {
        "title": "8.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_26.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_14.jpg_r4_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_26.jpg_r2_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_14.jpg_r5_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_15.jpg_r1_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_26.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_15.jpg_r2_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_27.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_15.jpg_r3_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_27.jpg_r2_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.6",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_15.jpg_r4_c0.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_27.jpg_r3_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.7",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_16.jpg_r2_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "8.8",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_16.jpg_r3_c0.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "9 Numerical methods",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_17.jpg_r1_c0.png"
      }
    ],
    "children": [
      {
        "title": "9.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_16.jpg_r4_c1.png"
          },
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_27.jpg_r4_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "9.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_16.jpg_r5_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "9.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_16.jpg_r6_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "9.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_17.jpg_r1_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "9.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_17.jpg_r2_c0.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "10 Vectors",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_18.jpg_r2_c0.png"
      }
    ],
    "children": [
      {
        "title": "10.1",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_17.jpg_r3_c1.png"
          }
        ],
        "children": []
      },
      {
        "title": "10.2",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_17.jpg_r4_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "10.3",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_17.jpg_r5_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "10.4",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_17.jpg_r6_c0.png"
          }
        ],
        "children": []
      },
      {
        "title": "10.5",
        "contents": [
          {
            "type": "image",
            "key": "/topic-extraction/cells/img_18.jpg_r2_c1.png"
          }
        ],
        "children": []
      }
    ]
  },
  {
    "title": "A01",
    "contents": [
      {
        "type": "image",
        "key": "/topic-extraction/cells/img_28.jpg_r1_c0.png"
      }
    ],
    "children": []
  }
]