CREATE TABLE table_18392 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who were the candidates in the election that featured incumbent don edwards?
SELECT "Candidates" FROM table_18392 WHERE "Incumbent" = 'Don Edwards'
SELECT "Candidates" FROM "table_18392" WHERE "Incumbent" = 'Don Edwards'