A black man is sitting at a bus stop.
A black man sitting.
For a black man to be sitting at a bus stop it must be true that a black man is sitting.
exists e1 s1 x1 x2 x3.(at(e1,x2) & n_stop(x2) & of(x2,x3) & n_bus(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_black(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & a_black(s1) & Theme(s1,x1))