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:
| Entrant | Constructor | Chassis | Engine † | Tyre | Driver | Rounds |
| --- | --- | --- | --- | --- | --- | --- |
| Winfield Williams | Williams - Mecachrome | FW20 | Mecachrome GC37-01 | G | Jacques Villeneuve | All |
| Winfield Williams | Williams - Mecachrome | FW20 | Mecachrome GC37-01 | G | Heinz-Harald Frentzen | All |
| Scuderia Ferrari Marlboro | Ferrari | F300 | Ferrari 047 | G | Michael Schumacher | All |
| Scuderia Ferrari Marlboro | Ferrari | F300 | Ferrari 047 | G | Eddie Irvine | All |
| Mild Seven Benetton Playlife | Benetton - Playlife | B198 | Playlife GC37-01 | B | Giancarlo Fisichella | All |
| Mild Seven Benetton Playlife | Benetton - Playlife | B198 | Playlife GC37-01 | B | Alexander Wurz | All |
| West McLaren Mercedes | McLaren - Mercedes | MP4-13 | Mercedes FO110G | B | David Coulthard | All |
| West McLaren Mercedes | McLaren - Mercedes | MP4-13 | Mercedes FO110G | B | Mika Häkkinen | All |
| Benson and Hedges Jordan | Jordan - Mugen-Honda | 198 | Mugen-Honda MF-301 HC | G | Damon Hill | All |
| Benson and Hedges Jordan | Jordan - Mugen-Honda | 198 | Mugen-Honda MF-301 HC | G | Ralf Schumacher | All |
| Gauloises Prost Peugeot | Prost - Peugeot | AP01 | Peugeot A16 | B | Olivier Panis | All |
| Gauloises Prost Peugeot | Prost - Peugeot | AP01 | Peugeot A16 | B | Jarno Trulli | All |
| Red Bull Sauber Petronas | Sauber - Petronas | C17 | Petronas SPE-01D | G | Jean Alesi | All |
| Red Bull Sauber Petronas | Sauber - Petronas | C17 | Petronas SPE-01D | G | Johnny Herbert | All |
| Danka Zepter Arrows | Arrows | A19 | Arrows T2-F1 | B | Pedro Diniz | All |
| Danka Zepter Arrows | Arrows | A19 | Arrows T2-F1 | B | Mika Salo | All |
| Stewart Ford | Stewart - Ford | SF02 | Ford VJ Zetec-R | B | Rubens Barrichello | All |
| Stewart Ford | Stewart - Ford | SF02 | Ford VJ Zetec-R | B | Jan Magnussen | 1–7 |
| Stewart Ford | Stewart - Ford | SF02 | Ford VJ Zetec-R | B | Jos Verstappen | 8–16 |
| Tyrrell Racing | Tyrrell - Ford | 026 | Ford JD Zetec-R | G | Ricardo Rosset | All |
| Tyrrell Racing | Tyrrell - Ford | 026 | Ford JD Zetec-R | G | Toranosuke Takagi | All |
| Fondmetal Minardi Team | Minardi - Ford | M198 | Ford JD Zetec-R | B | Shinji Nakano | All |
| Fondmetal Minardi Team | Minardi - Ford | M198 | Ford JD Zetec-R | B | Esteban Tuero | All |
Question:
Who was the constructor for a FW20 chassis?
Answer:
Williams - Mecachrome, Williams - Mecachrome