Question: when did the north sydney bears leave the nrl
[{'answer': '1999', 'provenance': [{'wikipedia_id': '693234', 'title': 'North Sydney Bears', 'start_paragraph_id': 1, 'start_character': 203, 'end_paragraph_id': 1, 'end_character': 207, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '693234', 'title': 'North Sydney Bears', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 506, 'bleu_score': 0.868105443600086, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5201426475915326228}, 'section': 'Section::::Abstract.'}]}]