Which 2019 Grammy Award was Luke Combs nominated for but did not win?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q83440', 'id': 0, 'label': 'country music'}, {'type': 'INTERNAL', 'name_': 'Q1027904', 'id': 1, 'label': 'Grammy Award for Song of the Year'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q41254', 'id': 2, 'label': 'Grammy Awards'}, {'type': 'INTERNAL', 'name_': 'Q482994', 'id': 3, 'label': 'album'}, {'type': 'INTERNAL', 'name_': 'Q5593916', 'id': 4, 'label': 'Grammy Trustees Award'}, {'type': 'INTERNAL', 'name_': 'Q269094', 'id': 5, 'label': 'Richard Rodgers'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q3113385', 'id': 6, 'label': 'Grammy Award for Best Musical Theater Album'}, {'type': 'INTERNAL', 'name_': 'Q1146861', 'id': 7, 'label': 'Cy Coleman'}, {'type': 'INTERNAL', 'name_': 'Q1545', 'id': 8, 'label': 'Cyndi Lauper'}, {'type': 'INTERNAL', 'name_': 'Q22678066', 'id': 9, 'label': 'Hamilton'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q23884740', 'id': 10, 'label': 'Luke Combs'}, {'type': 'INTERNAL', 'name_': 'Q64797182', 'id': 11, 'label': 'The Prequel'}, {'type': 'INTERNAL', 'name_': 'Q39069922', 'id': 12, 'label': 'When It Rains It Pours'}], 'links': [{'name_': 'P31', 'source': 1, 'target': 2, 'label': 'instance of'}, {'name_': 'P31', 'source': 4, 'target': 2, 'label': 'instance of'}, {'name_': 'P166', 'source': 5, 'target': 4, 'label': 'award received'}, {'name_': 'P166', 'source': 5, 'target': 6, 'label': 'award received'}, {'name_': 'P1411', 'source': 7, 'target': 1, 'label': 'nominated for'}, {'name_': 'P1411', 'source': 7, 'target': 6, 'label': 'nominated for'}, {'name_': 'P136', 'source': 8, 'target': 0, 'label': 'genre'}, {'name_': 'P166', 'source': 8, 'target': 6, 'label': 'award received'}, {'name_': 'P31', 'source': 9, 'target': 3, 'label': 'instance of'}, {'name_': 'P166', 'source': 9, 'target': 6, 'label': 'award received'}, {'name_': 'P31', 'source': 11, 'target': 3, 'label': 'instance of'}, {'name_': 'P175', 'source': 11, 'target': 10, 'label': 'performer'}, {'name_': 'P136', 'source': 12, 'target': 0, 'label': 'genre'}, {'name_': 'P175', 'source': 12, 'target': 10, 'label': 'performer'}]}