A group of children , riding bikes , wait on the edge of a skateboarding bowl , while a woman in a white shirt pushes a child in a stroller and a man in a woman sit in brown lawn chairs .
It is improbable that a group of people assemble at the skateboarding bowl .
It is certain that a group of people assemble at the skateboarding bowl .
It is improbable that a group of people assemble at the skateboarding bowl .
A group of people assemble at the skateboarding bowl .