Question: who developed an effective method for measuring attachment
[{'answer': 'Mary Ainsworth', 'provenance': [{'wikipedia_id': '5761692', 'title': 'Attachment measures', 'start_paragraph_id': 7, 'start_character': 175, 'end_paragraph_id': 7, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Measures of attachment in infants.:Strange Situation Procedure (SSP).\n'}]}, {'provenance': [{'wikipedia_id': '5761692', 'title': 'Attachment measures', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 582, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10106961686444282555}, 'section': 'Section::::Measures of attachment in infants.:Strange Situation Procedure (SSP).\n'}]}]