CREATE TABLE table_18403 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

How many parties won the election in the Louisiana 5 district?
SELECT COUNT("Party") FROM table_18403 WHERE "District" = 'Louisiana 5'
SELECT COUNT("Party") FROM "table_18403" WHERE "District" = 'Louisiana 5'