Question: where was the first boy scout world jamboree held
[{'answer': '1920', 'provenance': [{'wikipedia_id': '165966', 'title': 'World Scout Jamboree', 'start_paragraph_id': 10, 'start_character': 10, 'end_paragraph_id': 10, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '165966', 'title': 'World Scout Jamboree', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 258, 'bleu_score': 0.953991849837532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10297895221540949291}, 'section': 'Section::::History.\n'}]}]