user: Question: What is the host city of the Singapore Indoor Stadium venue and a Valentine's Day theme?
Columns: ['Year', 'Theme', 'Host city', 'Venue', 'Hosts']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2013 200 8', 'Carnival M is back!', 'Bali,Indonesia Genting Highlands', 'Bali International Covention Center Arena of Stars', 'Miley Cyrus Jared Leto and Karen Mok']
SQL:

assistant: SELECT "Host city" FROM "Table" WHERE "Venue" = 'Singapore Indoor Stadium' AND "Theme" = 'Valentine''s Day';