Question: who has scored the most goals for chelsea
[{'answer': 'Frank Lampard', 'provenance': [{'wikipedia_id': '4262628', 'title': 'List of Chelsea F.C. records and statistics', 'start_paragraph_id': 2, 'start_character': 342, 'end_paragraph_id': 2, 'end_character': 355, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]