A man does a bike trick on a dirt path.
A man does a skateboard trick on a dirt path.
The man either does a bike trick or a skateboard trick. He cannot physically do both simultaneously.
exists e1 x1 x2 x3 x4 x5.(on(e1,x4) & n_path(x4) & of(x4,x5) & n_dirt(x5) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & of(x2,x3) & n_bike(x3) & n_man(x1))
exists e1 x1 x2 x3 x4 x5.(on(e1,x4) & n_path(x4) & of(x4,x5) & n_dirt(x5) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & of(x2,x3) & n_skateboard(x3) & n_man(x1))