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post_id | category |
---|---|
1 | car |
1 | bed |
2 | car |
3 | bed |
3 | car |
4 | car |
4 | bicycle |
5 | car |
5 | bicycle |
5 | bed |
6 | bicycle |
6 | car |
post_id | cat_list |
---|---|
1 | bed,car |
3 | bed,car |
4 | bicycle,car |
6 | bicycle,car |