Someone is flipping on a blue trampoline.
A person on a trampoline.
A someone is a person and if they are flipping on a trampoline, they must be on a trampoline.
exists e1 s1 x1 x2.(on(e1,x2) & n_trampoline(x2) & a_blue(s1) & Theme(s1,x2) & Actor(e1,x1) & v_flip(e1) & n_person(x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_trampoline(x2) & n_person(x1))