Question: how many sets of twins do the duggars have
[{'answer': 'twice with twins', 'provenance': [{'wikipedia_id': '19767582', 'title': '19 Kids and Counting', 'start_paragraph_id': 7, 'start_character': 822, 'end_paragraph_id': 7, 'end_character': 838, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '19767582', 'title': '19 Kids and Counting', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 917, 'bleu_score': 0.8965486694338961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13235982278583773923}, 'section': 'Section::::Background.\n'}]}]