Question: the hard outer covering of a seed is called
[{'answer': 'seed coat', 'provenance': [{'wikipedia_id': '37694', 'title': 'Seed', 'start_paragraph_id': 2, 'start_character': 163, 'end_paragraph_id': 2, 'end_character': 172, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37694', 'title': 'Seed', 'start_paragraph_id': 34, 'start_character': 0, 'end_paragraph_id': 34, 'end_character': 669, 'bleu_score': 0.980097014099621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12893462713332080545}, 'section': 'Section::::Shape and appearance.\n'}]}]