Two men on a raft with a sofa.
There is a raft.
There must be a raft for men to be on it.
exists x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_sofa(x3) & on(x1,x2) & n_raft(x2) & n_man(x1) & card_eq_2(x1))
exists p1 x1 x2.((x1 = x2) & n_raft(x2))