Question: what is the name of the island east of the bridge in san francisco bay
[{'answer': 'Yerba Buena Island', 'provenance': [{'wikipedia_id': '165926', 'title': 'San Francisco–Oakland Bay Bridge', 'start_paragraph_id': 3, 'start_character': 260, 'end_paragraph_id': 3, 'end_character': 278, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '165926', 'title': 'San Francisco–Oakland Bay Bridge', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 990, 'bleu_score': 0.818459827983212, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12422379602120433290}, 'section': 'Section::::Background.\n'}]}]