Question: what is the number 1 sexually transmitted disease
[{'answer': 'Hepatitis B', 'provenance': [{'wikipedia_id': '19019270', 'title': 'Sexually transmitted infection', 'start_paragraph_id': 73, 'start_character': 82, 'end_paragraph_id': 73, 'end_character': 93, 'bleu_score': 1.0, 'section': 'Section::::Prevention.:Vaccines.\n'}]}, {'provenance': [{'wikipedia_id': '19019270', 'title': 'Sexually transmitted infection', 'start_paragraph_id': 107, 'start_character': 0, 'end_paragraph_id': 107, 'end_character': 571, 'bleu_score': 0.950027409461844, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6697103447116479438}, 'section': 'Section::::Epidemiology.\n'}]}]