user: Question: What is the W.A. of the 1 1st built?
Columns: ['1st built', '1913 Class', 'W.A.', 'No. Built', 'Builder', 'Date', 'LNER Class']
Types: ['real', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: [868.0, 'I', '4-4-2', 20.0, 'NBL (14) R. Stephenson (6)', '1906–11', 'C10']
SQL:

assistant: SELECT "W.A." FROM "Table" WHERE "1st built" = 1.0;