Question: when did the cleveland browns come back to the nfl
[{'answer': '1998', 'provenance': [{'wikipedia_id': '20328149', 'title': 'Cleveland Browns relocation controversy', 'start_paragraph_id': 1, 'start_character': 1070, 'end_paragraph_id': 1, 'end_character': 1074, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20328149', 'title': 'Cleveland Browns relocation controversy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1016, 'bleu_score': 0.7227959910550721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10652144238724556679}, 'section': 'Section::::Abstract.'}]}]