Question: how did leo dalton die in silent witness
[{'answer': 'in an explosion', 'provenance': [{'wikipedia_id': '143678', 'title': 'Silent Witness', 'start_paragraph_id': 6, 'start_character': 245, 'end_paragraph_id': 6, 'end_character': 260, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '143678', 'title': 'Silent Witness', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 372, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9765137331950308938}, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '143678', 'title': 'Silent Witness', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9765137331950308938}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '143678', 'title': 'Silent Witness', 'section': 'Section::::Background.\n', 'start_paragraph_id': 6, 'end_paragraph_id': 6, 'meta': {'evidence_span': ['. He is replaced by forensics expert Jack Hodgson (David Caves) and his assistant Clarissa Mullery (Liz Carr). During the sixteenth series Dr Dalton is killed in an explosion.', 'During the sixteenth series Dr Dalton is killed in an explosion', 'Dr Dalton is killed in an explosion']}}]}]