Question: when did england last host the eurovision song contest
[{'answer': '1998', 'provenance': [{'wikipedia_id': '17766232', 'title': 'United Kingdom in the Eurovision Song Contest', 'start_paragraph_id': 2, 'start_character': 624, 'end_paragraph_id': 2, 'end_character': 628, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]