Question: who is the longest serving manager in the english premier league
[{'answer': 'Jim Bentley', 'provenance': [{'wikipedia_id': '7728538', 'title': 'List of current Premier League and English Football League managers', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]