People in orange vests and blue pants with a yellow stripe at the bottom await the beginning of a race .
It is probably the case that people in orange vests await the beginning of a race to win first prize .
It is probably the case that people in orange vests await the beginning of a race to win first prize .
It is improbable that people in orange vests await the beginning of a race to win first prize .
People in orange vests await the beginning of a race to win first prize .