Question: when was the first chelsea flower show held
[{'answer': '1912', 'provenance': [{'wikipedia_id': '230704', 'title': 'Chelsea Flower Show', 'start_paragraph_id': 1, 'start_character': 243, 'end_paragraph_id': 1, 'end_character': 247, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '230704', 'title': 'Chelsea Flower Show', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 455, 'bleu_score': 0.9751504244977051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7742439630362975154}, 'section': 'Section::::Abstract.'}]}]