Question: who is credited with suggesting the word hello be used when answering the phone
[{'answer': 'Thomas Edison', 'provenance': [{'wikipedia_id': '6710844', 'title': 'Hello', 'start_paragraph_id': 7, 'start_character': 64, 'end_paragraph_id': 7, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Etymology.:Telephone.\n'}]}, {'provenance': [{'wikipedia_id': '6710844', 'title': 'Hello', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 371, 'bleu_score': 0.8958349161751291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17171732536693898216}, 'section': 'Section::::Etymology.:Telephone.\n'}]}]