CREATE TABLE table_18595 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What is the incumbent for ohio 12?
SELECT "Incumbent" FROM table_18595 WHERE "District" = 'Ohio 12'
SELECT "Incumbent" FROM "table_18595" WHERE "District" = 'Ohio 12'