Who developed a theory of evolution?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1063', 'id': 0, 'label': 'evolution'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q11640129', 'id': 1, 'label': 'theory of evolution'}], 'links': [{'name_': 'P921', 'source': 1, 'target': 0, 'label': 'main subject'}]}