Question: how old do you have to be to become a foreign exchange student
[{'answer': '15'}, {'provenance': [{'wikipedia_id': '1076499', 'title': 'Student exchange program', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 309, 'bleu_score': 0.8820568251238241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9727072387264894865}, 'section': 'Section::::Application process.\n'}]}]