Question: who played in the world series in 1990
[{'answer': 'Oakland Athletics', 'provenance': [{'wikipedia_id': '1217947', 'title': '1990 World Series', 'start_paragraph_id': 1, 'start_character': 245, 'end_paragraph_id': 1, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Cincinnati Reds', 'provenance': [{'wikipedia_id': '1217947', 'title': '1990 World Series', 'start_paragraph_id': 1, 'start_character': 305, 'end_paragraph_id': 1, 'end_character': 320, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1217947', 'title': '1990 World Series', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 950, 'bleu_score': 0.92180436655136, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8065708939223465806}, 'section': 'Section::::Abstract.'}]}]