Question: how many series of escape to the country are there
[{'answer': '20', 'provenance': [{'wikipedia_id': '4805656', 'title': 'Escape to the Country', 'start_paragraph_id': 1, 'start_character': 616, 'end_paragraph_id': 1, 'end_character': 618, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4805656', 'title': 'Escape to the Country', 'start_paragraph_id': 44, 'start_character': 0, 'end_paragraph_id': 44, 'end_character': 152, 'bleu_score': 0.934334813046729, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7592050710853880855}, 'section': 'Section::::DVD releases.\n'}]}]