A water glider.
A water glider waits it's captain.
A water glider does not imply that it waits.
exists x1 x2.(a_topic(x1) & n_glider(x1) & of(x1,x2) & n_water(x2))
exists e1 p1 x1 x2.(exists p2 x3.((x1 = x3) & n_captain(x3)) & n_thing(x1) & Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & n_glider(x1) & of(x1,x2) & n_water(x2))