user: Question: How many districts have an incumbent first elected in 1944?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['California 1', 'Hubert B. Scudder', 'Republican', 1948.0, 'Re-elected', 'Hubert B. Scudder (R) 54.0% Roger Kent (D) 46.0%']
SQL:

assistant: SELECT COUNT("District") FROM "Table" WHERE "First elected" = 1944.0;