Question: when do the interns become residents grey's anatomy
[{'answer': 'the fourth season premiere', 'provenance': [{'wikipedia_id': '28182107', 'title': "A Change Is Gonna Come (Grey's Anatomy)", 'start_paragraph_id': 1, 'start_character': 28, 'end_paragraph_id': 1, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28182107', 'title': "A Change Is Gonna Come (Grey's Anatomy)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 720, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 196566746402286792}, 'section': 'Section::::Abstract.'}]}]