user: Question: what is the material of the surface in the Dehradun , Uttarakhand, India location
Columns: ['Outcome', 'Date', 'Tournament', 'Location', 'Surface', 'Opponent in the final', 'Score in the final']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', '24 November 2008', '$10,000 Islamabad', 'Islamabad , Pakistan', 'Clay', 'Kim Hae-sung', '7–6(8), 6–4']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Location" = 'Dehradun , Uttarakhand, India';