Question: where was the first westfield shopping centre built
[{'answer': 'Blacktown', 'provenance': [{'wikipedia_id': '386189', 'title': 'Westfield Group', 'start_paragraph_id': 4, 'start_character': 144, 'end_paragraph_id': 4, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '386189', 'title': 'Westfield Group', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 345, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3729082165672509175}, 'section': 'Section::::History.\n'}]}]