Question: who is the tallest basketball player in the nba 2018
[{'answer': 'Kristaps Porziņģis', 'provenance': [{'wikipedia_id': '28754077', 'title': 'List of tallest players in National Basketball Association history', 'start_paragraph_id': 2, 'start_character': 98, 'end_paragraph_id': 2, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'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.'}]}, {'provenance': [{'wikipedia_id': '28754077', 'title': 'List of tallest players in National Basketball Association history', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 386, 'bleu_score': 0.5153796519269871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4550856602793309235}, 'section': 'Section::::Abstract.'}]}]