Question: sydney won the right to host the 2000 olympics after defeating which city by just two votes
[{'answer': 'Beijing', 'provenance': [{'wikipedia_id': '71432', 'title': '2000 Summer Olympics', 'start_paragraph_id': 4, 'start_character': 87, 'end_paragraph_id': 4, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Host city selection.\n'}]}]