CREATE TABLE table_21932 ("County" TEXT, "Precincts" TEXT, "E. Greenberg" TEXT, "G. Hager" TEXT, "T. Wyka" TEXT)

How many precincts are in the county where G. Hager received 19 (20%) votes?
SELECT "Precincts" FROM table_21932 WHERE "G. Hager" = '19 (20%)'
SELECT "Precincts" FROM "table_21932" WHERE "G. Hager" = '19 (20%)'