Question: who does sean astin play in lord of the rings
[{'answer': 'Samwise Gamgee', 'provenance': [{'wikipedia_id': '113063', 'title': 'Sean Astin', 'start_paragraph_id': 1, 'start_character': 137, 'end_paragraph_id': 1, 'end_character': 151, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]