CREATE TABLE table_18569 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

What year was clair engle first elected?
SELECT "First elected" FROM table_18569 WHERE "Incumbent" = 'Clair Engle'
SELECT "First elected" FROM "table_18569" WHERE "Incumbent" = 'Clair Engle'