Table: race_results_69
Columns: year
entrant
chassis
engine
points

Question: Which year had 0 points and an AGS JH23B chassis?
SQL: SELECT "year" FROM race_results_69 WHERE "points" = 0 AND "chassis" = 'ags jh23b'

Question: How many points does the year after 1986 with a AGS JH23B chassis have?
SQL: SELECT "points" FROM race_results_69 WHERE "year" > 1986 AND "chassis" = 'ags jh23b'

Question: How many points did the Tyrrell Racing Organisation have?
SQL: SELECT "points" FROM race_results_69 WHERE "entrant" = 'tyrrell racing organisation'