Question: when did premier league change to 20 teams
[{'answer': '1995', 'provenance': [{'wikipedia_id': '11250', 'title': 'Premier League', 'start_paragraph_id': 30, 'start_character': 56, 'end_paragraph_id': 30, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::History.:Development.\n'}]}]