CREATE TABLE table_72418 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

How many in lost renomination results were elected first?
SELECT "First elected" FROM table_72418 WHERE "Result" = 'Lost renomination'
SELECT "First elected" FROM "table_72418" WHERE "Result" = 'Lost renomination'