Which movie is part of the Marvel Cinematic Universe and has Chadwick Boseman in the titular role?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q642878', 'id': 0, 'label': 'Marvel Cinematic Universe'}, {'type': 'INTERNAL', 'name_': 'Q23781155', 'id': 1, 'label': 'Avengers: Endgame'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q5066520', 'id': 2, 'label': 'Chadwick Boseman'}, {'type': 'INTERNAL', 'name_': 'Q24050108', 'id': 3, 'label': 'Mantis'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q106729096', 'id': 4, 'label': 'The Guardians of the Galaxy Holiday Special'}], 'links': [{'name_': 'P1445', 'source': 0, 'target': 1, 'label': 'fictional universe described in'}, {'name_': 'P179', 'source': 1, 'target': 0, 'label': 'part of the series'}, {'name_': 'P161', 'source': 1, 'target': 2, 'label': 'cast member'}, {'name_': 'P1080', 'source': 3, 'target': 0, 'label': 'from narrative universe'}, {'name_': 'P1441', 'source': 3, 'target': 1, 'label': 'present in work'}, {'name_': 'P1441', 'source': 3, 'target': 4, 'label': 'present in work'}]}