A guy jumps high on his skateboard.
There is a man cooking.
When a man is jumping on his skateboard, he cannot be cooking.
exists e1 p1 x1 x2.(on(e1,x2) & n_skateboard(x2) & of(x2,x1) & n_male(x1) & exists s1.(Theme(s1,x1) & a_high(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_jump(e1) & n_guy(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_cooking(x2) & of(x2,x3) & n_man(x3))