Question: what is the title of the person who leads the house of representatives
[{'answer': 'Speaker of the House', 'provenance': [{'wikipedia_id': '19468510', 'title': 'United States House of Representatives', 'start_paragraph_id': 4, 'start_character': 29, 'end_paragraph_id': 4, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19468510', 'title': 'United States House of Representatives', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 313, 'bleu_score': 0.775917921463344, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11127619795984942233}, 'section': 'Section::::Abstract.'}]}]