Question: who designed a pinhole gamma ray called the collimeter
[{'answer': 'English physicist Henry Kater', 'provenance': [{'wikipedia_id': '1165029', 'title': 'Collimator', 'start_paragraph_id': 3, 'start_character': 3, 'end_paragraph_id': 3, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1165029', 'title': 'Collimator', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 284, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17766217511453509991}, 'section': 'Section::::History.\n'}]}]