Question: who has the authority to set the salaries of members of congress
[{'answer': 'Congress', 'provenance': [{'wikipedia_id': '19468510', 'title': 'United States House of Representatives', 'start_paragraph_id': 1, 'start_character': 83, 'end_paragraph_id': 1, 'end_character': 91, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19468510', 'title': 'United States House of Representatives', 'start_paragraph_id': 43, 'start_character': 0, 'end_paragraph_id': 43, 'end_character': 784, 'bleu_score': 0.9280265216762301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2486779752258370264}, 'section': 'Section::::Salary and benefits.:Salaries.\n'}]}]