user: Question: In what year was John Bell Williams first elected?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Mississippi 1', 'Thomas Abernethy', 'Democratic', 1942.0, 'Re-elected', 'Thomas Abernethy (D) Unopposed']
SQL:

assistant: SELECT "First elected" FROM "Table" WHERE "Incumbent" = 'John Bell Williams';