CREATE TABLE table_51721 ("Year" FLOAT, "Team" CLOB, "Chassis" CLOB, "Engine" CLOB, "Points" FLOAT)

What is the average point total for arrows racing team before 1983?
SELECT AVG("Points") FROM table_51721 WHERE "Team" = 'arrows racing team' AND "Year" < '1983'
SELECT AVG("Points") FROM "table_51721" WHERE "Team" = 'arrows racing team' AND "Year" < '1983'