Question: when does dr lewis come back to er
[{'answer': 'Season 8', 'provenance': [{'wikipedia_id': '2032943', 'title': 'Susan Lewis', 'start_paragraph_id': 2, 'start_character': 518, 'end_paragraph_id': 2, 'end_character': 526, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the final episode'}, {'provenance': [{'wikipedia_id': '2032943', 'title': 'Susan Lewis', 'start_paragraph_id': 2, 'start_character': 220, 'end_paragraph_id': 2, 'end_character': 748, 'bleu_score': 0.6893023628697951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18022272954413394383}, 'section': 'Section::::Abstract.'}]}]