Question: what is the capital and major population center of northern ireland
[{'answer': 'Belfast', 'provenance': [{'wikipedia_id': '5046', 'title': 'Belfast', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]