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 | Driver | Rounds |
| --- | --- | --- | --- | --- | --- |
| Scuderia Sud Americana | Maserati | 250F | Maserati 250F1 2.5 L6 | Juan Manuel Fangio | 1 |
| Scuderia Sud Americana | Maserati | 250F | Maserati 250F1 2.5 L6 | Carlos Menditeguy | 1 |
| Ken Kavanagh | Maserati | 250F | Maserati 250F1 2.5 L6 | Jean Behra | 1 |
| Ken Kavanagh | Maserati | 250F | Maserati 250F1 2.5 L6 | Luigi Taramazzo | 2 |
| Ken Kavanagh | Maserati | 250F | Maserati 250F1 2.5 L6 | Ken Kavanagh | 2, 5 |
| Jo Bonnier | Maserati | 250F | Maserati 250F1 2.5 L6 | Harry Schell | 1 |
| Jo Bonnier | Maserati | 250F | Maserati 250F1 2.5 L6 | Jo Bonnier | 2–3, 5, 7, 9 |
| Jo Bonnier | Maserati | 250F | Maserati 250F1 2.5 L6 | Phil Hill | 6 |
| Jo Bonnier | Maserati | 250F | Maserati 250F1 2.5 L6 | Giulio Cabianca | 10 |
| Jo Bonnier | Maserati | 250F | Maserati 250F1 2.5 L6 | Hans Herrmann | 10–11 |
| Francesco Godia Sales | Maserati | 250F | Maserati 250F1 2.5 L6 | Paco Godia | 1–2, 5–6 |
| H.H. Gould | Maserati | 250F | Maserati 250F1 2.5 L6 | Horace Gould | 1–3 |
| H.H. Gould | Maserati | 250F | Maserati 250F1 2.5 L6 | Masten Gregory | 3 |
| R.R.C. Walker Racing Team | Cooper - Climax | T43 T45 | Climax FPF 2.0 L4 | Stirling Moss | 1 |
| R.R.C. Walker Racing Team | Cooper - Climax | T43 T45 | Climax FPF 2.0 L4 | Maurice Trintignant | 2–3, 7–11 |
| R.R.C. Walker Racing Team | Cooper - Climax | T43 T45 | Climax FPF 2.0 L4 | Ron Flockhart | 2 |
| R.R.C. Walker Racing Team | Cooper - Climax | T43 | Climax FPF 1.5 L4 | François Picard | 11 |
| Scuderia Ferrari | Ferrari | 246 | Ferrari 143 2.4 V6 | Luigi Musso | 1–3, 5–6 |
| Scuderia Ferrari | Ferrari | 246 | Ferrari 143 2.4 V6 | Peter Collins | 1–3, 5–8 |
| Scuderia Ferrari | Ferrari | 246 | Ferrari 143 2.4 V6 | Mike Hawthorn | 1–3, 5–11 |
| Scuderia Ferrari | Ferrari | 246 | Ferrari 143 2.4 V6 | Wolfgang von Trips | 2, 6–10 |
| Scuderia Ferrari | Ferrari | 246 | Ferrari 143 2.4 V6 | Olivier Gendebien | 5, 10–11 |
| Scuderia Ferrari | Ferrari | 246 | Ferrari 143 2.4 V6 | Phil Hill | 10–11 |
| Scuderia Ferrari | Ferrari | 156 | Ferrari D156 1.5 V6 | Phil Hill | 8 |
| Owen Racing Organisation | BRM | P25 | BRM P25 2.5 L4 | Jean Behra | 2–3, 5–11 |
| Owen Racing Organisation | BRM | P25 | BRM P25 2.5 L4 | Harry Schell | 2–3, 5–11 |
| Owen Racing Organisation | BRM | P25 | BRM P25 2.5 L4 | Maurice Trintignant | 6 |
| Owen Racing Organisation | BRM | P25 | BRM P25 2.5 L4 | Jo Bonnier | 10–11 |
| Owen Racing Organisation | BRM | P25 | BRM P25 2.5 L4 | Ron Flockhart | 11 |
| Bernie C. Ecclestone | Connaught - Alta | B | Alta GP 2.5 L4 | Bernie Ecclestone | 2 |
| Bernie C. Ecclestone | Connaught - Alta | B | Alta GP 2.5 L4 | Bruce Kessler | 2 |
| Bernie C. Ecclestone | Connaught - Alta | B | Alta GP 2.5 L4 | Paul Emery | 2 |
| Bernie C. Ecclestone | Connaught - Alta | B | Alta GP 2.5 L4 | Jack Fairman | 7 |
| Bernie C. Ecclestone | Connaught - Alta | B | Alta GP 2.5 L4 | Ivor Bueb | 7 |
| Cooper Car Company | Cooper - Climax | T45 T44 | Climax FPF 2.0 L4 | Jack Brabham | 2–3, 5–7, 9–10 |
| Cooper Car Company | Cooper - Climax | T45 T44 | Climax FPF 2.0 L4 | Roy Salvadori | 2–3, 5–11 |
| Cooper Car Company | Cooper - Climax | T45 T44 | Climax FPF 2.0 L4 | Ian Burgess | 7 |
| Cooper Car Company | Cooper - Climax | T45 T44 | Climax FPF 2.0 L4 | Jack Fairman | 11 |
| Cooper Car Company | Cooper - Climax | T45 | Climax FPF 1.5 L4 | Bruce McLaren | 8, 11 |
| Cooper Car Company | Cooper - Climax | T45 | Climax FPF 1.5 L4 | Jack Brabham | 8, 11 |
| Team Lotus | Lotus - Climax | 12 16 | Climax FPF 2.0 L4 Climax FPF 2.2 L4 | Cliff Allison | 2–3, 5–8, 10–11 |
| Team Lotus | Lotus - Climax | 12 16 | Climax FPF 2.0 L4 Climax FPF 2.2 L4 | Graham Hill | 2–3, 5–7, 9–11 |
| Team Lotus | Lotus - Climax | 12 16 | Climax FPF 2.0 L4 Climax FPF 2.2 L4 | Alan Stacey | 7 |
| Team Lotus | Lotus - Climax | 16 | Climax FPF 1.5 L4 | Graham Hill | 8 |
| Vandervell Products | Vanwall | VW 5 | Vanwall 254 2.5 L4 | Stirling Moss | 2–3, 5–11 |
| Vandervell Products | Vanwall | VW 5 | Vanwall 254 2.5 L4 | Tony Brooks | 2–3, 5–11 |
| Vandervell Products | Vanwall | VW 5 | Vanwall 254 2.5 L4 | Stuart Lewis-Evans | 2–3, 5–7, 9–11 |
| Maria Teresa de Filippis | Maserati | 250F | Maserati 250F1 2.5 L6 | Maria Teresa de Filippis | 2, 5, 10 |
| Giorgio Scarlatti | Maserati | 250F | Maserati 250F1 2.5 L6 | Giorgio Scarlatti | 2–3 |
| Giorgio Scarlatti | Maserati | 250F | Maserati 250F1 2.5 L6 | Jo Bonnier | 6 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Gerino Gerini | 2, 6–7, 10–11 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Maurice Trintignant | 5 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Masten Gregory | 5 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Wolfgang Seidel | 5, 11 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Carroll Shelby | 6–7, 10 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Troy Ruttman | 6, 8 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Jo Bonnier | 8 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Hans Herrmann | 8 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Cliff Allison | 9 |
| Scuderia Centro Sud | Maserati | 250F | Maserati 250F1 2.5 L6 | Maria Teresa de Filippis | 9 |
| Scuderia Centro Sud | Cooper - Climax | T43 | Climax FPF 1.5 L4 | Wolfgang Seidel | 8 |
| OSCA Automobili | OSCA | F2 | OSCA 372 1.5 L4 | Giulio Cabianca | 2 |
| OSCA Automobili | OSCA | F2 | OSCA 372 1.5 L4 | Luigi Piotti | 2 |
| André Testut | Maserati | 250F | Maserati 250F1 2.5 L6 | André Testut | 2 |
| André Testut | Maserati | 250F | Maserati 250F1 2.5 L6 | Louis Chiron | 2 |
| Ecurie Maarsbergen | Porsche | RSK | Porsche 547/3 1.5 F4 | Carel Godin de Beaufort | 3 |
| Ecurie Maarsbergen | Porsche | RS550 | Porsche 547/3 1.5 F4 | Carel Godin de Beaufort | 8 |
| Juan Manuel Fangio | Maserati | 250F | Maserati 250F1 2.5 L6 | Juan Manuel Fangio | 6 |
| Dick Gibson | Cooper - Climax | T43 | Climax FPF 1.5 L4 | Dick Gibson | 8 |
| Dr Ing F. Porsche KG | Porsche | RSK | Porsche 547/3 1.5 F4 | Edgar Barth | 8 |
| High Efficiency Motors | Cooper - Climax | T43 | Climax FPF 1.5 L4 | Ian Burgess | 8 |
| Ecurie Eperon d'Or | Cooper - Climax | T43 | Climax FPF 1.5 L4 | Christian Goethals | 8 |
| Ecurie Demi Litre | Lotus - Climax | 12 | Climax FPF 1.5 L4 | Ivor Bueb | 8 |
| J.B. Naylor | Cooper - Climax | T45 | Climax FPF 1.5 L4 | Brian Naylor | 8 |
| Tony Marsh | Cooper - Climax | T45 | Climax FPF 1.5 L4 | Tony Marsh | 8 |
| Temple Buell | Maserati | 250F | Maserati 250F1 2.5 L6 | Carroll Shelby | 9–10 |
| Temple Buell | Maserati | 250F | Maserati 250F1 2.5 L6 | Masten Gregory | 10–11 |
| André Guelfi | Cooper - Climax | T45 | Climax FPF 1.5 L4 | André Guelfi | 11 |
| British Racing Partnership | Cooper - Climax | T45 | Climax FPF 1.5 L4 | Tom Bridger | 11 |
| Robert La Caze | Cooper - Climax | T45 | Climax FPF 1.5 L4 | Robert La Caze | 11 |
Question:
What was the constructor for jo bonnier of 6 rounds?
Answer:
Maserati