A man who appears to be the band leader is reading from a large white card which he is holding in his left hand , while facing persons holding tubas .
There is almost no chance that a marching band is playing a show on a football field .
There is almost no chance that a marching band is playing a show on a football field .
It is probable that a marching band is playing a show on a football field .
A marching band is playing a show on a football field .