Question: who has the most assists in la liga
[{'answer': 'Lionel Messi', 'provenance': [{'wikipedia_id': '17937080', 'title': 'Football records and statistics in Spain', 'start_paragraph_id': 92, 'start_character': 69, 'end_paragraph_id': 92, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::League.:Appearances.\n'}]}]