user: Question: In district New York 10th, what was the reason for change?
Columns: ['District', 'Vacator', 'Reason for change', 'Successor', 'Date successor seated']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['New York 7th', 'Vacant', 'Rep. John J. Delaney died during previous congress', 'Louis B. Heller (D)', 'February 15, 1949']
SQL:

assistant: SELECT "Reason for change" FROM "Table" WHERE "District" = 'New York 10th';