CREATE TABLE table_28923 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

How many parties were first elected in 1805?
SELECT COUNT("Party") FROM table_28923 WHERE "First elected" = '1805'
SELECT COUNT("Party") FROM "table_28923" WHERE "First elected" = '1805'