A boat worker holding a rope.
There is a dolphin swimming alone in a pool.
A boat worker is not a dolphin.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_hold(e1) & n_rope(x4) & (x1 = x3) & n_worker(x1) & of(x1,x2) & n_boat(x2))
exists p1 x1 x2 x3 x4.((x1 = x2) & in(x2,x4) & n_pool(x4) & r_alone(x2) & n_swimming(x2) & of(x2,x3) & n_dolphin(x3))