Question: how many episodes in how i met your mother season 8
[{'answer': '24', 'provenance': [{'wikipedia_id': '31526510', 'title': 'How I Met Your Mother (season 8)', 'start_paragraph_id': 1, 'start_character': 192, 'end_paragraph_id': 1, 'end_character': 194, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]