Question: who scored the most goals in the nhl
[{'answer': 'Wayne Gretzky', 'provenance': [{'wikipedia_id': '585899', 'title': 'List of NHL statistical leaders', 'start_paragraph_id': 6, 'start_character': 13, 'end_paragraph_id': 6, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Skaters.:All-time leaders (skaters).:Regular season: Points per game.\n'}]}]