Question: where does edema tend to occur in the pregnant woman’s body
[{'answer': 'the feet', 'provenance': [{'wikipedia_id': '27289540', 'title': 'Maternal physiological changes in pregnancy', 'start_paragraph_id': 38, 'start_character': 23, 'end_paragraph_id': 38, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Hematology.:Edema.\n'}]}, {'provenance': [{'wikipedia_id': '27289540', 'title': 'Maternal physiological changes in pregnancy', 'start_paragraph_id': 38, 'start_character': 0, 'end_paragraph_id': 38, 'end_character': 149, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3067714146970777100}, 'section': 'Section::::Hematology.:Edema.\n'}]}]