CREATE TABLE table_68845 ("Round" FLOAT, "Name" CLOB, "Position" CLOB, "School" CLOB, "Signed" CLOB)

what is the school when signed is no and round is 50?
SELECT "School" FROM table_68845 WHERE "Signed" = 'no' AND "Round" = '50'
SELECT "School" FROM "table_68845" WHERE "Round" = '50' AND "Signed" = 'no'