CREATE TABLE table_34072 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Leading scorer" TEXT, "Attendance" TEXT, "Record" TEXT)

What is the leading scorer of the game with the Celtics as the visiting team?
SELECT "Leading scorer" FROM table_34072 WHERE "Visitor" = 'celtics'
SELECT "Leading scorer" FROM "table_34072" WHERE "Visitor" = 'celtics'