Question: who gave the land for arlington national cemetery
[{'answer': 'Custis Lee', 'provenance': [{'wikipedia_id': '83390', 'title': 'Arlington National Cemetery', 'start_paragraph_id': 2, 'start_character': 173, 'end_paragraph_id': 2, 'end_character': 183, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '83390', 'title': 'Arlington National Cemetery', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 921, 'bleu_score': 0.9090850990420001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8526696001573806399}, 'section': 'Section::::History.\n'}]}]