Question: what is the largest ethnic group in new jersey
[{'answer': 'White American', 'provenance': [{'wikipedia_id': '21648', 'title': 'New Jersey', 'start_paragraph_id': 73, 'start_character': 18, 'end_paragraph_id': 73, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::Demographics.:State population.\n'}]}]