Question: how many always sunny in philadelphia seasons are there
[{'answer': 'fourteenth', 'provenance': [{'wikipedia_id': '2434796', 'title': "It's Always Sunny in Philadelphia", 'start_paragraph_id': 2, 'start_character': 62, 'end_paragraph_id': 2, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2434796', 'title': "It's Always Sunny in Philadelphia", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 268, 'bleu_score': 0.589798797380487, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16110825898764983407}, 'section': 'Section::::Abstract.'}]}]