Question: what effect does anp have on blood pressure
[{'answer': 'decreased blood pressure', 'provenance': [{'wikipedia_id': '475143', 'title': 'Atrial natriuretic peptide', 'start_paragraph_id': 2, 'start_character': 204, 'end_paragraph_id': 2, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '475143', 'title': 'Atrial natriuretic peptide', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 399, 'bleu_score': 0.918221068290973, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7041361913253499047}, 'section': 'Section::::Abstract.'}]}]