CREATE TABLE table_50118 ("Points" FLOAT, "Score" TEXT, "Premiers" TEXT, "Runners Up" TEXT, "Details" TEXT)

Which premier team played the 1951 NSWRFL Grand Final?
SELECT "Premiers" FROM table_50118 WHERE "Details" = '1951 nswrfl grand final'
SELECT "Premiers" FROM "table_50118" WHERE "Details" = '1951 nswrfl grand final'