Question: how many seasons are in it's always sunny in philadelphia
[{'answer': 'fourteenth season', 'provenance': [{'wikipedia_id': '2434796', 'title': "It's Always Sunny in Philadelphia", 'start_paragraph_id': 2, 'start_character': 62, 'end_paragraph_id': 2, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]