Table:
text: 1956 Formula One season
Teams and drivers
Teams and drivers
Entrant Constructor_ Chassis Engine Tyre Driver Rounds
Emeryson Cars Emeryson - Alta 56 Alta GP 2.5 L4 D Paul Emery 6
Ottorino Volonterio Maserati A6GCM Maserati 250F1 2.5 L6 P Ottorino Volonterio 7

Question: What is the tire in the 1956 Formula 1 season with a 56 chassis among teams and drivers?