CREATE TABLE table_28849 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

How many incumbents was first elected in the Anti-Masonic party?
SELECT COUNT("First elected") FROM table_28849 WHERE "Party" = 'Anti-Masonic'
SELECT COUNT("First elected") FROM "table_28849" WHERE "Party" = 'Anti-Masonic'