Question: when did ant and dec join byker grove
[{'answer': '1989', 'provenance': [{'wikipedia_id': '464847', 'title': 'Ant & Dec', 'start_paragraph_id': 5, 'start_character': 86, 'end_paragraph_id': 5, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '464847', 'title': 'Ant & Dec', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 341, 'bleu_score': 0.6597083583373511, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11851988139937613874}, 'section': 'Section::::Background.\n'}]}]