Question: who has the highest free throw percentage in nba history
[{'answer': 'José Calderón', 'provenance': [{'wikipedia_id': '35402792', 'title': 'List of National Basketball Association annual free throw percentage leaders', 'start_paragraph_id': 1, 'start_character': 246, 'end_paragraph_id': 1, 'end_character': 259, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35402792', 'title': 'List of National Basketball Association annual free throw percentage leaders', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 611, 'bleu_score': 0.864344363143795, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18106260111051830240}, 'section': 'Section::::Abstract.'}]}]