Question: who had the most goals in the nhl
[{'answer': 'Wayne Gretzky', 'provenance': [{'wikipedia_id': '4430001', 'title': 'List of NHL players with 500 goals', 'start_paragraph_id': 9, 'start_character': 63, 'end_paragraph_id': 9, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Player achievements.\n'}]}]