Question: who plays bill avery on when calls the heart
[{'answer': 'Jack Wagner', 'provenance': [{'wikipedia_id': '41630866', 'title': 'When Calls the Heart', 'start_paragraph_id': 14, 'start_character': 12, 'end_paragraph_id': 14, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Main.\n'}]}]