Question: what was the basis of conflict between spain and cuba in the 1890s
[{'answer': 'independence from Spain', 'provenance': [{'wikipedia_id': '3635027', 'title': 'Cuban War of Independence', 'start_paragraph_id': 3, 'start_character': 936, 'end_paragraph_id': 3, 'end_character': 959, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '3635027', 'title': 'Cuban War of Independence', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 1075, 'bleu_score': 0.9694685313847601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9994079687147571390}, 'section': 'Section::::Background.\n'}]}]