Question: who is the tallest basketball player in nba
[{'answer': 'Boban Marjanović', 'provenance': [{'wikipedia_id': '28754077', 'title': 'List of tallest players in National Basketball Association history', 'start_paragraph_id': 2, 'start_character': 121, 'end_paragraph_id': 2, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]