Question: what is the part of the cow where milk comes from
[{'answer': 'mammary glands', 'provenance': [{'wikipedia_id': '1555269', 'title': 'Milking', 'start_paragraph_id': 1, 'start_character': 45, 'end_paragraph_id': 1, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1555269', 'title': 'Milking', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 356, 'bleu_score': 0.9434724611166201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 924796008383607037}, 'section': 'Section::::Abstract.'}]}]