Question: who started the red scare in the united states in the 1950s
[{'answer': 'Senator Joseph McCarthy', 'provenance': [{'wikipedia_id': '174806', 'title': 'Red Scare', 'start_paragraph_id': 9, 'start_character': 137, 'end_paragraph_id': 9, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Second Red Scare (1947–60).\n'}]}, {'provenance': [{'wikipedia_id': '174806', 'title': 'Red Scare', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 491, 'bleu_score': 0.6315453340804861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12357301254726870207}, 'section': 'Section::::Second Red Scare (1947–60).\n'}]}]