Question: how did the silkworms that were first used in europe end up there
[{'answer': 'The Crusades', 'provenance': [{'wikipedia_id': '10783723', 'title': 'History of silk', 'start_paragraph_id': 2, 'start_character': 371, 'end_paragraph_id': 2, 'end_character': 383, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10783723', 'title': 'History of silk', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 854, 'bleu_score': 0.9423758475247941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16558286541752245818}, 'section': 'Section::::Abstract.'}]}]