fix readme

README.md

@@ -43,7 +43,7 @@ plt.show()
 * `points`: `(batch, point, 3)` array of uint8.
 * `label`: `(batch, 1)` array of uint8.
 
-Where `point` is the number of points in the point cloud. Points have no order and are shuffled when creating the data. Each point has the structure `[x, y, v]` where:
+Where `point` is the number of points in the point cloud. Points have no order and were shuffled when creating the data. Each point has the structure `[x, y, v]` where:
 
 * `x`: is the x coordinate of the point in the image.
 * `y`: is the y coordinate of the point in the image.