| timestamp,action_type,item_id,source,user_answer,platform | |
| 1562581709101,enter,e5474,my_note,,web | |
| 1562581732646,quit,e5474,my_note,,web | |
| 1562593768790,enter,e501,tutor,,web | |
| 1562593778504,quit,e501,tutor,,web | |
| 1562593996697,enter,e5528,my_note,,web | |
| 1562594094556,quit,e5528,my_note,,web | |
| 1562594116120,enter,e5528,my_note,,web | |
| 1562594157116,quit,e5528,my_note,,web | |
| 1562594163002,enter,e176,my_note,,web | |
| 1562594319542,quit,e176,my_note,,web | |
| 1562594322230,enter,e150,my_note,,web | |
| 1562594419961,quit,e150,my_note,,web | |
| 1562594449505,enter,e1803,my_note,,web | |
| 1562594664481,quit,e1803,my_note,,web | |
| 1562594679954,enter,e5299,my_note,,web | |
| 1562594767260,quit,e5299,my_note,,web | |