CREATE TABLE table_18139 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB, "Candidates" CLOB)

Who's the incumbent of Florida 12 district?
SELECT "Incumbent" FROM table_18139 WHERE "District" = 'Florida 12'
SELECT "Incumbent" FROM "table_18139" WHERE "District" = 'Florida 12'