user: Question: Name the disposition for date built is March 1909
Columns: ['Number', 'Builder', 'Type', 'Date built', 'Heritage', 'Disposition', 'Notes']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['5', 'American Locomotive Company', '2-8-2 T', 'October 1906', 'New for $15,371', 'Rebuilt in April 1913 into No. 80.', 'Built in Dunkirk, New York .']
SQL:

assistant: SELECT "Disposition" FROM "Table" WHERE "Date built" = 'March 1909';