Question: how many countries are there in the eurovision song contest final
[{'answer': 'Twenty - six countries', 'provenance': [{'wikipedia_id': '49778373', 'title': 'Eurovision Song Contest 2017', 'start_paragraph_id': 59, 'start_character': 0, 'end_paragraph_id': 59, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Participating countries.:Final.\n'}]}, {'provenance': [{'wikipedia_id': '49778373', 'title': 'Eurovision Song Contest 2017', 'start_paragraph_id': 59, 'start_character': 0, 'end_paragraph_id': 59, 'end_character': 213, 'bleu_score': 0.8635707684233571, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3869123334120722009}, 'section': 'Section::::Participating countries.:Final.\n'}]}]