Question: what is the population of long island 2018
[{'answer': '7,869,820', 'provenance': [{'wikipedia_id': '18315', 'title': 'Long Island', 'start_paragraph_id': 4, 'start_character': 38, 'end_paragraph_id': 4, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]