Question: who plays the t rex in the good dinosaur
[{'answer': 'Sam Elliott', 'provenance': [{'wikipedia_id': '35737961', 'title': 'The Good Dinosaur', 'start_paragraph_id': 1, 'start_character': 562, 'end_paragraph_id': 1, 'end_character': 573, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35737961', 'title': 'The Good Dinosaur', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 105, 'bleu_score': 0.861173529963367, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13798527112631855031}, 'section': 'Section::::Voice cast.\n'}]}]