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 | Pts. |
| --- | --- | --- | --- | --- |
| 1991.0 | Motor Racing Developments Ltd | Brabham BT59Y | Yamaha V12 | 1.0 |
| 1991.0 | Motor Racing Developments Ltd | Brabham BT60Y | Yamaha V12 | 1.0 |
| 1993.0 | Ligier Gitanes Blondes | Ligier JS39 | Renault V10 | 10.0 |
| 1994.0 | Tyrrell | Tyrrell 022 | Yamaha V10 | 8.0 |
| 1995.0 | Marlboro McLaren Mercedes | McLaren MP4/10 | Mercedes V10 | 13.0 |
| 1995.0 | Marlboro McLaren Mercedes | McLaren MP4/10B | Mercedes V10 | 13.0 |
| 1995.0 | Marlboro McLaren Mercedes | McLaren MP4/10C | Mercedes V10 | 13.0 |
Question:
In what year did a car have a yamaha v12 engine and a brabham bt60y chassis
Answer:
1991.0