Question: who discovered the quantum mechanical model of the atom
[{'answer': 'Werner Heisenberg', 'provenance': [{'wikipedia_id': '4831', 'title': 'Bohr model', 'start_paragraph_id': 22, 'start_character': 222, 'end_paragraph_id': 22, 'end_character': 239, 'bleu_score': 1.0, 'section': 'Section::::Origin.\n'}]}, {'provenance': [{'wikipedia_id': '4831', 'title': 'Bohr model', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 661, 'bleu_score': 0.9808590314834971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1785802022052245765}, 'section': 'Section::::Origin.\n'}]}]