CREATE TABLE table_name_73 (points NUMBER, chassis VARCHAR2, year VARCHAR2)

What point is the lowest for listings of chassis labeled AGS JH23 before 1988?
SELECT MIN(points) FROM table_name_73 WHERE chassis = "ags jh23" AND year < 1988
SELECT MIN("points") FROM "table_name_73" WHERE "ags jh23" = "chassis" AND "year" < 1988