Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Entrant | Chassis | Engine | Points |
| --- | --- | --- | --- | --- |
| 1984.0 | Equipe Renault Elf | Renault RE50 | Renault V6 | 0.0 |
| 1985.0 | Equipe Ligier Gitanes | Ligier JS25 | Renault V6 | 4.0 |
| 1985.0 | Tyrrell Racing Organisation | Tyrrell 014 | Renault V6 | 4.0 |
| 1986.0 | Data General Team Tyrrell | Tyrrell 014 | Renault V6 | 3.0 |
| 1986.0 | Data General Team Tyrrell | Tyrrell 015 | Renault V6 | 3.0 |
| 1987.0 | Data General Team Tyrrell | Tyrrell DG016 | Cosworth V8 | 4.0 |
| 1988.0 | Automobiles Gonfaronnaises Sportives | AGS JH23 | Cosworth V8 | 0.0 |
| 1989.0 | Automobiles Gonfaronnaises Sportives | AGS JH23B | Cosworth V8 | 0.0 |
Question:
Which year had 0 points and an AGS JH23B chassis?
Answer:
1989.0