A baseball catcher catches a ball while the umpire watches.
A baseball game is being played
Since a baseball catcher is catching a ball a game of baseball is being played.
exists e1 x1 x2 x3 x4 x5.(n_watch(x4) & of(x4,x5) & n_umpire(x5) & while(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_catch(e1) & n_ball(x3) & n_catcher(x1) & of(x1,x2) & n_baseball(x2))
exists e1 x1 x2.(Theme(e1,x1) & v_play(e1) & n_game(x1) & of(x1,x2) & n_baseball(x2))