Question: how many us colleges and universities are there
[{'answer': '4,726', 'provenance': [{'wikipedia_id': '3189597', 'title': 'Higher education in the United States', 'start_paragraph_id': 83, 'start_character': 204, 'end_paragraph_id': 83, 'end_character': 209, 'bleu_score': 1.0, 'section': 'Section::::Statistics.\n'}]}]