Question: who played david in homeland last sunday channel 4
[{'answer': 'Linus Roache', 'provenance': [{'wikipedia_id': '56041672', 'title': 'Homeland (season 7)', 'start_paragraph_id': 50, 'start_character': 119, 'end_paragraph_id': 50, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}]