A baseball player swings to hit the ball as an umpire crouches behind him.
A sporting event is in progress.
A baseball player with an umpire behind him implies there is a sporting event occurring.
(x)
exists p1 s1 x1.(exists x2.(in(x1,x2) & n_progress(x2)) & n_event(x1) & a_sporting(s1) & Theme(s1,x1))