A dog catches a ball in midair.
A dog jumps in the air and catches a ball.
A dog must jump to catch a ball in midair.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & in(x2,x3) & n_midair(x3) & n_ball(x2) & n_dog(x1))
exists e2 e1 x1 x2 x3 x4.(n_air(x2) & Theme(e2,x4) & Actor(e2,x3) & v_catch(e2) & n_ball(x4) & n_dog(x3) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))