| timestamp,action_type,item_id,source,user_answer,platform | |
| 1562388252059,enter,b4044,diagnosis,,mobile | |
| 1562388264559,respond,q5512,diagnosis,c,mobile | |
| 1562388271215,submit,b4044,diagnosis,,mobile | |
| 1562388272059,enter,b3185,diagnosis,,mobile | |
| 1562388285197,respond,q4653,diagnosis,d,mobile | |
| 1562388287115,respond,q4653,diagnosis,c,mobile | |
| 1562388292690,submit,b3185,diagnosis,,mobile | |
| 1562388292782,enter,b4480,diagnosis,,mobile | |
| 1562388306555,respond,q5948,diagnosis,b,mobile | |
| 1562388311885,submit,b4480,diagnosis,,mobile | |
| 1562388311995,enter,b3135,diagnosis,,mobile | |
| 1562388324714,respond,q4603,diagnosis,d,mobile | |
| 1562388332265,submit,b3135,diagnosis,,mobile | |
| 1562388332389,enter,b204,diagnosis,,mobile | |
| 1562388360620,respond,q204,diagnosis,c,mobile | |
| 1562388362361,respond,q204,diagnosis,b,mobile | |
| 1562388363191,respond,q204,diagnosis,a,mobile | |
| 1562388363659,respond,q204,diagnosis,c,mobile | |
| 1562388367820,submit,b204,diagnosis,,mobile | |
| 1562388367942,enter,b381,diagnosis,,mobile | |
| 1562388385670,respond,q381,diagnosis,a,mobile | |
| 1562388390546,submit,b381,diagnosis,,mobile | |
| 1562388390667,enter,b123,diagnosis,,mobile | |
| 1562388413457,respond,q123,diagnosis,a,mobile | |
| 1562388420606,submit,b123,diagnosis,,mobile | |
| 1562389451917,enter,e1249,review,,mobile | |
| 1562389453007,quit,e1249,review,,mobile | |
| 1562389454862,enter,e289,review,,mobile | |
| 1562389456507,quit,e289,review,,mobile | |
| 1562390419481,enter,e6345,review,,mobile | |
| 1562390428850,quit,e6345,review,,mobile | |
| 1562579552464,enter,b1573,tutor,,mobile | |
| 1562579658637,respond,q1917,tutor,b,mobile | |
| 1562579666916,submit,b1573,tutor,,mobile | |
| 1562579666961,enter,e1573,tutor,,mobile | |
| 1562579723522,quit,e1573,tutor,,mobile | |
| 1562579723621,enter,l816,tutor,,mobile | |
| 1562579893086,quit,l816,tutor,,mobile | |
| 1562579901635,enter,l495,tutor,,mobile | |
| 1562580152878,quit,l495,tutor,,mobile | |
| 1562580164141,enter,b5471,tutor,,mobile | |
| 1562580407662,respond,q7875,tutor,c,mobile | |
| 1562580409922,respond,q7875,tutor,b,mobile | |
| 1562580425927,submit,b5471,tutor,,mobile | |
| 1562580425964,enter,e5471,tutor,,mobile | |
| 1562580639817,quit,e5471,tutor,,mobile | |