there are proplems with the identifieers and duplicate data in these fixtures:
QuestionTag:
t1: { question_id: q1, user_id: fabien, tag: relatives }
t2: { question_id: q1, user_id: fabien, tag: girl }
t4: { question_id: q1, user_id: francois, tag: activities }
t6: { question_id: q2, user_id: francois, tag: 'real life' }
t5: { question_id: q2, user_id: fabien, tag: relatives }
t5: { question_id: q2, user_id: fabien, tag: present }
t6: { question_id: q2, user_id: francois, tag: 'real life' }
t7: { question_id: q3, user_id: francois, tag: blog }
t8: { question_id: q3, user_id: francois, tag: activities }
Todo: Check if any of those is required by a later example and correct it.
