Question: longest and most expensive trial in us history
[{'answer': 'The McMartin preschool trial', 'provenance': [{'wikipedia_id': '880284', 'title': 'McMartin preschool trial', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '880284', 'title': 'McMartin preschool trial', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 769, 'bleu_score': 0.984904577301502, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18056115762615417066}, 'section': 'Section::::Abstract.'}]}]