| timestamp,action_type,item_id,source,user_answer,platform | |
| 1562424499591,enter,b4730,diagnosis,,mobile | |
| 1562424531705,respond,q6198,diagnosis,d,mobile | |
| 1562424538394,submit,b4730,diagnosis,,mobile | |
| 1562424538467,enter,b518,diagnosis,,mobile | |
| 1562424542028,respond,q518,diagnosis,c,mobile | |
| 1562424559749,respond,q518,diagnosis,a,mobile | |
| 1562424560665,respond,q518,diagnosis,b,mobile | |
| 1562424561278,respond,q518,diagnosis,c,mobile | |
| 1562424567896,respond,q518,diagnosis,a,mobile | |
| 1562424572879,submit,b518,diagnosis,,mobile | |
| 1562424572966,enter,b326,diagnosis,,mobile | |
| 1562424591511,respond,q326,diagnosis,c,mobile | |
| 1562424595232,submit,b326,diagnosis,,mobile | |
| 1562424595320,enter,b4109,diagnosis,,mobile | |
| 1562424609039,respond,q5577,diagnosis,a,mobile | |
| 1562424612674,submit,b4109,diagnosis,,mobile | |
| 1562424612759,enter,b307,diagnosis,,mobile | |
| 1562424631025,respond,q307,diagnosis,a,mobile | |
| 1562424634720,submit,b307,diagnosis,,mobile | |
| 1562424634804,enter,b5009,diagnosis,,mobile | |
| 1562424655571,respond,q6477,diagnosis,b,mobile | |
| 1562424659433,submit,b5009,diagnosis,,mobile | |
| 1562424659506,enter,b981,diagnosis,,mobile | |
| 1562424676126,respond,q981,diagnosis,c,mobile | |
| 1562424680770,submit,b981,diagnosis,,mobile | |
| 1562599268375,enter,l742,tutor,,mobile | |
| 1562599327998,quit,l742,tutor,,mobile | |