A person dressed in a green protective suit is riding an all terrain vehicle across a desert .
It is impossible that an atv speeds across the desert to escape the wolves , its rider wearing a protective suit .
It is impossible that an atv speeds across the desert to escape the wolves , its rider wearing a protective suit .
It is certain that an atv speeds across the desert to escape the wolves , its rider wearing a protective suit .
An atv speeds across the desert to escape the wolves , its rider wearing a protective suit .