Question: what nhl teams did wayne gretzky play for
[{'answer': 'Edmonton Oilers', 'provenance': [{'wikipedia_id': '33422', 'title': 'Wayne Gretzky', 'start_paragraph_id': 3, 'start_character': 143, 'end_paragraph_id': 3, 'end_character': 158, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Los Angeles Kings', 'provenance': [{'wikipedia_id': '33422', 'title': 'Wayne Gretzky', 'start_paragraph_id': 3, 'start_character': 325, 'end_paragraph_id': 3, 'end_character': 342, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'St. Louis Blues', 'provenance': [{'wikipedia_id': '33422', 'title': 'Wayne Gretzky', 'start_paragraph_id': 3, 'start_character': 559, 'end_paragraph_id': 3, 'end_character': 574, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'New York Rangers', 'provenance': [{'wikipedia_id': '33422', 'title': 'Wayne Gretzky', 'start_paragraph_id': 3, 'start_character': 612, 'end_paragraph_id': 3, 'end_character': 628, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]