Question: what is the tea bag made out of
[{'answer': 'filter paper', 'provenance': [{'wikipedia_id': '214968', 'title': 'Tea bag', 'start_paragraph_id': 2, 'start_character': 30, 'end_paragraph_id': 2, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'food - grade plastic', 'provenance': [{'wikipedia_id': '214968', 'title': 'Tea bag', 'start_paragraph_id': 2, 'start_character': 46, 'end_paragraph_id': 2, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'occasionally of silk', 'provenance': [{'wikipedia_id': '214968', 'title': 'Tea bag', 'start_paragraph_id': 2, 'start_character': 69, 'end_paragraph_id': 2, 'end_character': 89, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]