user: Question: Which house has an abbreviation of D?
Columns: ['House', 'Abbr.', 'Type', 'Colour', 'Boarding/Day']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Saunderites', 'S', 'Old', 'Orange', 'Boarding']
SQL:

assistant: SELECT "House" FROM "Table" WHERE "Abbr." = 'D';