CREATE TABLE table_8731 ("Game" FLOAT, "Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Location" CLOB, "Record" CLOB)

Who played against the Celtics on Sat. Feb. 23?
SELECT "Opponent" FROM table_8731 WHERE "Date" = 'sat. feb. 23'
SELECT "Opponent" FROM "table_8731" WHERE "Date" = 'sat. feb. 23'