user: Question: Which candidates are from the Missouri 3 district?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Missouri 1', 'Bill Clay', 'Democratic', 1968.0, 'Re-elected', 'Bill Clay (D) 66.1% Robert J. Wittman (R) 33.9%']
SQL:

assistant: SELECT "Candidates" FROM "Table" WHERE "District" = 'Missouri 3';