Question: when did the brooklyn dodgers become the los angeles dodgers
[{'answer': 'before the 1958 season', 'provenance': [{'wikipedia_id': '18213', 'title': 'Los Angeles Dodgers', 'start_paragraph_id': 1, 'start_character': 285, 'end_paragraph_id': 1, 'end_character': 307, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18213', 'title': 'Los Angeles Dodgers', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 431, 'bleu_score': 0.959174024466199, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10520146849363637890}, 'section': 'Section::::Abstract.'}]}]