Question: where are the walking legs of crustaceans found
[{'answer': 'the thoracic segments', 'provenance': [{'wikipedia_id': '40119056', 'title': 'Crustacean', 'start_paragraph_id': 7, 'start_character': 154, 'end_paragraph_id': 7, 'end_character': 175, 'bleu_score': 1.0, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '40119056', 'title': 'Crustacean', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 508, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15231899445697980034}, 'section': 'Section::::Structure.\n'}]}]