CREATE TABLE table_47302 ("Game" FLOAT, "Date" TEXT, "Team" TEXT, "Score" TEXT, "High rebounds" TEXT, "High assists" TEXT, "Location Attendance" TEXT, "Record" TEXT)

What date was the location attendance at&t center 18,797, and a game earlier than 57?
SELECT "Date" FROM table_47302 WHERE "Location Attendance" = 'at&t center 18,797' AND "Game" < '57'
SELECT "Date" FROM "table_47302" WHERE "Game" < '57' AND "Location Attendance" = 'at&t center 18,797'