user: Question: Name the sign of zodiac for Chithirai
Columns: ['Months in Malayalam Era', 'In Malayalam', 'Gregorian Calendar', 'Tamil calendar', 'Saka era', 'Sign of Zodiac']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Chingam', 'ചിങ്ങം', 'August–September', 'Aavani', 'Sravan–Bhadrapada', 'Leo']
SQL:

assistant: SELECT "Sign of Zodiac" FROM "Table" WHERE "Tamil calendar" = 'Chithirai';