CREATE TABLE table_18422 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

What district is incumbent frank chelf from?
SELECT "District" FROM table_18422 WHERE "Incumbent" = 'Frank Chelf'
SELECT "District" FROM "table_18422" WHERE "Incumbent" = 'Frank Chelf'