Question: who was best known for his involved in the red scare following wwii
[{'answer': 'Joseph McCarthy', 'provenance': [{'wikipedia_id': '174806', 'title': 'Red Scare', 'start_paragraph_id': 9, 'start_character': 145, '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': 4124792873703316708}, 'section': 'Section::::Second Red Scare (1947–60).\n'}]}]