user: Question: Who ran in the race for Jack Brooks' seat?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Texas 2', 'Jack Brooks', 'Democratic', 1952.0, 'Re-elected', 'Jack Brooks (D) 62.7% John Greco (R) 37.3%']
SQL:

assistant: SELECT "Candidates" FROM "Table" WHERE "Incumbent" = 'Jack Brooks';