| timestamp,action_type,item_id,source,user_answer,platform | |
| 1562150602134,enter,b4605,diagnosis,,mobile | |
| 1562150641487,respond,q6073,diagnosis,c,mobile | |
| 1562150647943,submit,b4605,diagnosis,,mobile | |
| 1562150648037,enter,b2225,diagnosis,,mobile | |
| 1562150662814,respond,q3693,diagnosis,b,mobile | |
| 1562150667493,submit,b2225,diagnosis,,mobile | |
| 1562150667591,enter,b6931,diagnosis,,mobile | |
| 1562150684505,respond,q9580,diagnosis,b,mobile | |
| 1562150688605,submit,b6931,diagnosis,,mobile | |
| 1562150688683,enter,b307,diagnosis,,mobile | |
| 1562150708761,respond,q307,diagnosis,a,mobile | |
| 1562150712662,submit,b307,diagnosis,,mobile | |
| 1562150712760,enter,b3916,diagnosis,,mobile | |
| 1562150734593,respond,q5384,diagnosis,c,mobile | |
| 1562150739145,submit,b3916,diagnosis,,mobile | |
| 1562150739233,enter,b5750,diagnosis,,mobile | |
| 1562150776085,respond,q8399,diagnosis,d,mobile | |
| 1562150780242,submit,b5750,diagnosis,,mobile | |
| 1562150780335,enter,b4079,diagnosis,,mobile | |
| 1562150789517,respond,q5547,diagnosis,a,mobile | |
| 1562150795253,submit,b4079,diagnosis,,mobile | |
| 1562591927920,enter,b906,tutor,,mobile | |
| 1562591975089,respond,q906,tutor,c,mobile | |
| 1562591980196,submit,b906,tutor,,mobile | |
| 1562591980283,enter,e906,tutor,,mobile | |
| 1562591995659,quit,e906,tutor,,mobile | |