Some people with black belts , or black and red belts , are performing martial arts on a green mat .
We believe that some people with black and red belts , are performing martial arts on a green mat
We believe that some people with black and red belts , are performing martial arts on a green mat
It is highly unlikely that some people with black and red belts , are performing martial arts on a green mat
Some people with black and red belts , are performing martial arts on a green mat