What is the population density in the Brighton area?
{'header': ['Local Government Area', 'Principal town', 'Land Area (km²)', 'Population 2011 census', 'Density', 'Region'], 'page_title': 'Local government areas of Tasmania', 'section_title': 'LGAs', 'caption': 'LGAs', 'rows': [["Break O'Day", 'St Helens', '3,525.8', '6194', '1.8', 'North-east'], ['Brighton', 'Brighton', '171.3', '15460', '90.3', 'Hobart'], ['Central Coast', 'Ulverstone', '933.1', '21355', '22.9', 'North-west and west coast'], ['Central Highlands', 'Hamilton', '7,982.4', '2262', '0.3', 'Central'], ['Circular Head', 'Smithton', '4,897.7', '7977', '1.6', 'North-west and west coast'], ['Burnie (City of)', 'Burnie', '611.0', '19329', '31.6', 'North-west and west coast'], ['Clarence (City of)', 'Rosny Park', '378.0', '51852', '137.2', 'Hobart'], ['Devonport (City of)', 'Devonport', '111.3', '24615', '221.2', 'North-west and west coast'], ['Glenorchy (City of)', 'Glenorchy', '121.1', '44656', '368.8', 'Hobart'], ['Hobart (City of)', 'Hobart', '77.9', '48703', '625.2', 'Hobart'], ['Launceston (City of)', 'Launceston', '1,413.6', '64193', '45.4', 'Launceston'], ['Derwent Valley', 'New Norfolk', '4,108.1', '9704', '2.4', 'South-east'], ['Dorset', 'Scottsdale', '3,227.6', '6827', '2.1', 'North-east'], ['Flinders', 'Whitemark', '1,996.6', '776', '0.4', 'North-east'], ['George Town', 'George Town', '653.4', '6636', '10.2', 'Launceston'], ['Glamorgan Spring Bay', 'Triabunna', '2,591.4', '4190', '1.6', 'South-east'], ['Huon Valley', 'Huonville', '5,507.4', '15140', '2.7', 'South-east'], ['Kentish', 'Sheffield', '1,156.0', '6086', '5.3', 'North-west and west coast'], ['King Island', 'Currie', '1,095.8', '1566', '1.4', 'North-west and west coast'], ['Kingborough', 'Kingston', '720.1', '33893', '47.1', 'Hobart'], ['Latrobe', 'Latrobe', '600.5', '9833', '16.4', 'North-west and west coast'], ['Meander Valley', 'Westbury', '3,330.3', '18888', '5.7', 'Launceston'], ['Northern Midlands', 'Longford', '5,136.5', '12228', '2.4', 'Central'], ['Sorell', 'Sorell', '583.7', '13194', '22.6', 'South-east'], ['Southern Midlands', 'Oatlands', '2,615.4', '6049', '2.3', 'Central'], ['Tasman', 'Nubeena', '660.5', '2355', '3.6', 'South-east'], ['Waratah-Wynyard', 'Wynyard', '3,531.0', '13708', '3.9', 'North-west and west coast'], ['West Coast', 'Zeehan', '9,589.8', '4678', '0.5', 'North-west and west coast'], ['West Tamar', 'Beaconsfield', '691.1', '21817', '31.6', 'Launceston']]}