Question: who does milo ventimiglia play on this is us
[{'answer': 'Jack Pearson', 'provenance': [{'wikipedia_id': '20596343', 'title': 'Milo Ventimiglia', 'start_paragraph_id': 1, 'start_character': 387, 'end_paragraph_id': 1, 'end_character': 399, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20596343', 'title': 'Milo Ventimiglia', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 428, 'bleu_score': 0.878999945597258, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15744308264864943968}, 'section': 'Section::::Abstract.'}]}]