A brown dog is jumping through a field.
a dog in a field looking for a ball
A dog jumping through a field does not always look for a ball.
exists e1 s1 x1 x2.(through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_ball(x3) & Actor(e1,x1) & v_look(e1) & in(x1,x2) & n_field(x2) & n_dog(x1))