Question: how many episodes are there in dev dd
[{'answer': 'eleven', 'provenance': [{'wikipedia_id': '55213781', 'title': 'Dev DD', 'start_paragraph_id': 3, 'start_character': 4, 'end_paragraph_id': 3, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55213781', 'title': 'Dev DD', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 139, 'bleu_score': 0.9181891462193901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12319286368521858098}, 'section': 'Section::::Abstract.'}]}]