user: Question: Name the nickname with age of 4.9
Columns: ['Island', 'Nickname', 'Area', 'Population (as of 2010)', 'Highest point', 'Elevation', 'Age ( Ma )']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Hawai ʻ i', 'The Big Island', 'sqmi (km2)', 185079.0, 'Mauna Kea', 'ft (m)', '0.4']
SQL:

assistant: SELECT "Nickname" FROM "Table" WHERE "Age ( Ma )" = '4.9';