Question: what is the main language spoken in cuba
[{'answer': 'Spanish', 'provenance': [{'wikipedia_id': '5042481', 'title': 'Cuba', 'start_paragraph_id': 2, 'start_character': 106, 'end_paragraph_id': 2, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]