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 | Tyre | Driver | Rounds |
| --- | --- | --- | --- | --- | --- |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Juan Manuel Fangio | 1, 3 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Onofre Marimón | 1, 3–6 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Luigi Musso | 1, 8–9 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Prince Bira | 1 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Sergio Mantovani | 3–4, 6–9 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Alberto Ascari | 4–5 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Luigi Villoresi | 4–6, 8 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Roberto Mieres | 7–9 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Stirling Moss | 7, 9 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Harry Schell | 7 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Louis Rosier | 8 |
| Officine Alfieri Maserati | Maserati | 250F A6GCM | P | Paco Godia | 9 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Giuseppe Farina | 1, 3 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | José Froilán González | 1, 3–8 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Mike Hawthorn | 1, 3–9 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Umberto Maglioli | 1, 7–8 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Maurice Trintignant | 4–9 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Piero Taruffi | 6 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Robert Manzon | 7–8 |
| Scuderia Ferrari | Ferrari | 625 553 500 | P | Alberto Ascari | 8 |
| Equipe Gordini | Gordini | T16 | E | Jean Behra | 1, 3–9 |
| Equipe Gordini | Gordini | T16 | E | Élie Bayol | 1 |
| Equipe Gordini | Gordini | T16 | E | Roger Loyer | 1 |
| Equipe Gordini | Gordini | T16 | E | Paul Frère | 3–4, 6 |
| Equipe Gordini | Gordini | T16 | E | André Pilette | 3, 5–6 |
| Equipe Gordini | Gordini | T16 | E | Jacques Pollet | 4, 9 |
| Equipe Gordini | Gordini | T16 | E | Clemar Bucci | 5–8 |
| Equipe Gordini | Gordini | T16 | E | Fred Wacker | 7–8 |
| Ecurie Rosier | Ferrari Maserati | 500 625 250F | D P | Louis Rosier | 1, 4–6, 9 |
| Ecurie Rosier | Ferrari Maserati | 500 625 250F | D P | Maurice Trintignant | 1, 3 |
| Ecurie Rosier | Ferrari Maserati | 500 625 250F | D P | Robert Manzon | 4–6, 9 |
| Harry Schell | Maserati | A6GCM 250F | P | Harry Schell | 1, 4–6, 9 |
| Emmanuel de Graffenried | Maserati | A6GCM | P | Toulo de Graffenried | 1, 9 |
| Emmanuel de Graffenried | Maserati | A6GCM | P | Ottorino Volonterio | 9 |
| Roberto Mieres | Maserati | A6GCM 250F | P | Roberto Mieres | 1, 3–6 |
| Jorge Daponte | Maserati | A6GCM | P | Jorge Daponte | 1, 8 |
| Onofre Marimón | Maserati | A6GCM | P | Carlos Menditeguy | 1 |
| Ecurie Francorchamps | Ferrari | 500 | E | Jacques Swaters | 3, 7, 9 |
| Prince Bira | Maserati | 250F | P | Prince Bira | 3–6, 9 |
| Prince Bira | Maserati | 250F | D | Ron Flockhart | 5 |
| Equipe Moss A.E. Moss | Maserati | 250F | P | Stirling Moss | 3, 5–6, 8 |
| Daimler Benz AG | Mercedes | W196 | C | Juan Manuel Fangio | 4–9 |
| Daimler Benz AG | Mercedes | W196 | C | Karl Kling | 4–9 |
| Daimler Benz AG | Mercedes | W196 | C | Hans Herrmann | 4, 6–9 |
| Daimler Benz AG | Mercedes | W196 | C | Hermann Lang | 6 |
| Georges Berger | Gordini | T16 | E | Georges Berger | 4 |
| HW Motors | HWM - Alta | 53 | D | Lance Macklin | 4 |
| Owen Racing Organisation | Maserati | 250F | D | Ken Wharton | 4–7, 9 |
| Owen Racing Organisation | Maserati | 250F | D | Guerino Bertocchi | 9 |
| Gilby Engineering | Maserati | 250F | D | Roy Salvadori | 4–5 |
| Scuderia Ambrosiana | Ferrari | 500 | A | Reg Parnell | 5 |
| G.A. Vandervell Vandervell Products | Vanwall | Special | P | Peter Collins | 5, 8–9 |
| Peter Whitehead | Cooper - Alta | T24 | D | Peter Whitehead | 5 |
| Bill Whitehouse | Connaught - Lea-Francis | A | D | Bill Whitehouse | 5 |
| Leslie Marr | Connaught - Lea-Francis | A | D | Leslie Marr | 5 |
| R.R.C. Walker Racing Team | Connaught - Lea-Francis | A | D | John Riseley-Prichard | 5 |
| Sir Jeremy Boles | Connaught - Lea-Francis | A | D | Don Beauman | 5 |
| Ecurie Ecosse | Connaught - Lea-Francis | A | D | Leslie Thorne | 5 |
| R.J. Chase | Cooper - Bristol | T23 | D | Alan Brown | 5 |
| Gould's Garage (Bristol) | Cooper - Bristol | T23 | D | Horace Gould | 5 |
| Bob Gerard | Cooper - Bristol | T23 | D | Bob Gerard | 5 |
| Ecurie Richmond | Cooper - Bristol | T23 | D | Eric Brandon | 5 |
| Ecurie Richmond | Cooper - Bristol | T23 | D | Rodney Nuckey | 5 |
| Hans Klenk | Klenk - BMW | Meteor | P | Theo Helfrich | 6 |
| Giovanni de Riu | Maserati | A6GCM | P | Giovanni de Riu | 8 |
| Scuderia Lancia | Lancia | D50 | P | Alberto Ascari | 9 |
| Scuderia Lancia | Lancia | D50 | P | Luigi Villoresi | 9 |
Question:
What was tyre that was made by cooper - bristol that was driven by bob gerard?
Answer:
D