Four teenagers , three girls and one boy , are jumping in the air on a sidewalk by the river .
There is a very good chance that four teenagers , three girls and one boy , are happily jumping .
There is a very good chance that four teenagers , three girls and one boy , are happily jumping .
It is probably not the case that four teenagers , three girls and one boy , are happily jumping .
Four teenagers , three girls and one boy , are happily jumping .