Question: who has more nba championships celtics or lakers
[{'answer': 'Celtics', 'provenance': [{'wikipedia_id': '1931138', 'title': 'Celtics–Lakers rivalry', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]