Who was the first rap artist?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q30', 'id': 0, 'label': 'United States of America'}, {'type': 'INTERNAL', 'name_': 'Q5383', 'id': 1, 'label': 'David Bowie'}, {'type': 'INTERNAL', 'name_': 'Q2643890', 'id': 2, 'label': 'vocalist'}, {'type': 'INTERNAL', 'name_': 'Q6010', 'id': 3, 'label': 'rapping'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q2252262', 'id': 4, 'label': 'rapper'}, {'type': 'INTERNAL', 'name_': 'Q463606', 'id': 5, 'label': 'American Book Awards'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q458787', 'id': 6, 'label': 'DJ Kool Herc'}, {'type': 'INTERNAL', 'name_': 'Q20743300', 'id': 7, 'label': 'Vinyl'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P106', 'source': 1, 'target': 2, 'label': 'occupation'}, {'name_': 'P136', 'source': 1, 'target': 3, 'label': 'genre'}, {'name_': 'P495', 'source': 3, 'target': 0, 'label': 'country of origin'}, {'name_': 'P3095', 'source': 3, 'target': 4, 'label': 'practiced by'}, {'name_': 'P279', 'source': 4, 'target': 2, 'label': 'subclass of'}, {'name_': 'P425', 'source': 4, 'target': 3, 'label': 'field of this occupation'}, {'name_': 'P17', 'source': 5, 'target': 0, 'label': 'country'}, {'name_': 'P1346', 'source': 5, 'target': 6, 'label': 'winner'}, {'name_': 'P495', 'source': 7, 'target': 0, 'label': 'country of origin'}, {'name_': 'P674', 'source': 7, 'target': 1, 'label': 'characters'}, {'name_': 'P674', 'source': 7, 'target': 6, 'label': 'characters'}]}