Question: who played sam ryan's son in silent witness
[{'answer': 'Matthew Steer', 'provenance': [{'wikipedia_id': '143678', 'title': 'Silent Witness', 'start_paragraph_id': 32, 'start_character': 24, 'end_paragraph_id': 32, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Characters.:Other characters.\n'}]}, {'provenance': [{'wikipedia_id': '143678', 'title': 'Silent Witness', 'start_paragraph_id': 32, 'start_character': 0, 'end_paragraph_id': 32, 'end_character': 162, 'bleu_score': 0.9271474438253491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10084217785598811013}, 'section': 'Section::::Characters.:Other characters.\n'}]}]