Question: bengal was the first champion of santosh trophy. whom did they defeat in the finals
[{'answer': 'Delhi', 'provenance': [{'wikipedia_id': '5030522', 'title': 'Santosh Trophy', 'start_paragraph_id': 15, 'start_character': 12, 'end_paragraph_id': 15, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Current sides.\n'}]}]