CREATE TABLE table_5184 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Location" TEXT, "Record" TEXT)

Location of boston garden, and a Record of 58-23 involved what opponent?
SELECT "Opponent" FROM table_5184 WHERE "Location" = 'boston garden' AND "Record" = '58-23'
SELECT "Opponent" FROM "table_5184" WHERE "Location" = 'boston garden' AND "Record" = '58-23'