Question: the force that holds neutrons and protons together in the nucleus is known as
[{'answer': 'nuclear', 'provenance': [{'wikipedia_id': '1982496', 'title': 'Nuclear force', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'nucleon -- nucleon'}, {'answer': '( or nucleon -- nucleon interaction'}, {'provenance': [{'wikipedia_id': '1982496', 'title': 'Nuclear force', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 485, 'bleu_score': 0.974188104609039, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 137171301836861401}, 'section': 'Section::::Abstract.'}]}]