Question: who tried to evaluate attitude through the social distance
[{'answer': 'Emory S. Bogardus', 'provenance': [{'wikipedia_id': '2973694', 'title': 'Bogardus social distance scale', 'start_paragraph_id': 1, 'start_character': 79, 'end_paragraph_id': 1, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2973694', 'title': 'Bogardus social distance scale', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 278, 'bleu_score': 0.953991849837532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17966267212522125783}, 'section': 'Section::::Abstract.'}]}]