Question: who plays tupac shakur in all eyez on me
[{'answer': 'Demetrius Shipp Jr.', 'provenance': [{'wikipedia_id': '48919161', 'title': 'All Eyez on Me (film)', 'start_paragraph_id': 1, 'start_character': 238, 'end_paragraph_id': 1, 'end_character': 257, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48919161', 'title': 'All Eyez on Me (film)', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 47, 'bleu_score': 0.6803749333171201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5454517498500161746}, 'section': 'Section::::Cast.\n'}]}]