a girl jumps on the trampoline.
A girl jumps on a trampoline.
The trampoline is a trampoline.
exists e1 x1 x2.(n_trampoline(x2) & on(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_girl(x1))
exists e1 x1 x2.(on(e1,x2) & n_trampoline(x2) & Actor(e1,x1) & v_jump(e1) & n_girl(x1))