Question: at which stage does a silkworm produce silk thread
[{'answer': 'larvae', 'provenance': [{'wikipedia_id': '953081', 'title': 'Sericulture', 'start_paragraph_id': 11, 'start_character': 45, 'end_paragraph_id': 11, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Production.:Stages of production.\n'}]}, {'provenance': [{'wikipedia_id': '953081', 'title': 'Sericulture', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 314, 'bleu_score': 0.515663997492522, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17535803483843797078}, 'section': 'Section::::Production.\n'}]}]