CREATE TABLE table_18232 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who were all the candidates when incumbent was Tim Valentine?
SELECT "Candidates" FROM table_18232 WHERE "Incumbent" = 'Tim Valentine'
SELECT "Candidates" FROM "table_18232" WHERE "Incumbent" = 'Tim Valentine'