Read the following premise and answer if the hypothesis is true.
The 1978 Formula One season was the 32nd season of FIA Formula One motor racing. It featured the 1978 World Championship of F1 Drivers and the International Cup for F1 Constructors, contested concurrently over a sixteen race series which commenced on 15 January and ended on 8 October. The season also included the non-championship BRDC International Trophy.
Hypothesis: A german racer won the championship in 1978. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say without checking the specific drivers and their nationalities in the 1978 F1 season.