CREATE TABLE table_18645 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What was the party that was frist elected in 1919?
SELECT "Party" FROM table_18645 WHERE "First elected" = '1919'
SELECT "Party" FROM "table_18645" WHERE "First elected" = '1919'