A man talks on a cellphone while sitting on a stoop.
A man in a collared shirt is sitting on a stoop.
A man talks on a cellphone while sitting on a stoop does not necessary that he is in collared shirt
(x)
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_stoop(x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_shirt(x2) & a_collared(s1) & Theme(s1,x2) & n_man(x1))