There is a man in a black trench coat.
A man is a gangster wearing a long coat.
Wearing a black trench coat does not make a person a gangster.
exists p1 x1 s1 x2 x3 x4.((x1 = x2) & in(x2,x3) & n_coat(x3) & of(x3,x4) & n_trench(x4) & a_black(s1) & Theme(s1,x3) & n_man(x2))
exists p1 x1.(exists e1 s1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_coat(x4) & a_long(s1) & Theme(s1,x4) & (x2 = x3) & n_gangster(x2)) & n_man(x1))