| timestamp,action_type,item_id,source,user_answer,platform | |
| 1561543870898,enter,b3520,diagnosis,,mobile | |
| 1561543897048,respond,q4988,diagnosis,a,mobile | |
| 1561543903345,submit,b3520,diagnosis,,mobile | |
| 1561543903562,enter,b5075,diagnosis,,mobile | |
| 1561543943024,respond,q6543,diagnosis,d,mobile | |
| 1561543946988,submit,b5075,diagnosis,,mobile | |
| 1561543947067,enter,b3917,diagnosis,,mobile | |
| 1561543967627,respond,q5385,diagnosis,c,mobile | |
| 1561543971662,submit,b3917,diagnosis,,mobile | |
| 1561543971763,enter,b3125,diagnosis,,mobile | |
| 1561544025123,respond,q4593,diagnosis,b,mobile | |
| 1561544035335,submit,b3125,diagnosis,,mobile | |
| 1561544035436,enter,b4145,diagnosis,,mobile | |
| 1561544075117,respond,q5613,diagnosis,d,mobile | |
| 1561544078706,submit,b4145,diagnosis,,mobile | |
| 1561544078817,enter,b3326,diagnosis,,mobile | |
| 1561544126919,respond,q4794,diagnosis,b,mobile | |
| 1561544130453,submit,b3326,diagnosis,,mobile | |
| 1561544130563,enter,b2529,diagnosis,,mobile | |
| 1561544187637,respond,q3997,diagnosis,b,mobile | |
| 1561544189692,respond,q3997,diagnosis,a,mobile | |
| 1561544190234,respond,q3997,diagnosis,c,mobile | |
| 1561544192740,respond,q3997,diagnosis,b,mobile | |
| 1561544206589,submit,b2529,diagnosis,,mobile | |
| 1561544327085,enter,l489,tutor,,mobile | |
| 1561544833624,quit,l489,tutor,,mobile | |