Question: who played in the world series in 1989
[{'answer': 'Oakland Athletics', 'provenance': [{'wikipedia_id': '1217959', 'title': '1989 World Series', 'start_paragraph_id': 1, 'start_character': 233, 'end_paragraph_id': 1, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'San Francisco Giants', 'provenance': [{'wikipedia_id': '1217959', 'title': '1989 World Series', 'start_paragraph_id': 1, 'start_character': 289, 'end_paragraph_id': 1, 'end_character': 309, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1217959', 'title': '1989 World Series', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 727, 'bleu_score': 0.8212557445639761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5668292377876924006}, 'section': 'Section::::Abstract.'}]}]