Question: who plays porter collins in the big short
[{'answer': 'Hamish Linklater', 'provenance': [{'wikipedia_id': '45051881', 'title': 'The Big Short (film)', 'start_paragraph_id': 1, 'start_character': 398, 'end_paragraph_id': 1, 'end_character': 414, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]