Question: how many seasons are there of hey arnold
[{'answer': '5 seasons', 'provenance': [{'wikipedia_id': '5416747', 'title': 'List of Hey Arnold! episodes', 'start_paragraph_id': 1, 'start_character': 310, 'end_paragraph_id': 1, 'end_character': 319, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5416747', 'title': 'List of Hey Arnold! episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 485, 'bleu_score': 0.7779577688441851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6725944874136436021}, 'section': 'Section::::Abstract.'}]}]