An old man sits outside an open doorway on a low stool
An old man sits in a doorway on a stool
An old man sits in a doorway on a stool is part of the description while outside an open doorway.
exists e1 s1 s2 s3 x1 x2 x3.(on(e1,x3) & n_stool(x3) & a_low(s3) & Theme(s3,x3) & outside(e1,x2) & n_doorway(x2) & a_open(s2) & Theme(s2,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_stool(x3) & in(e1,x2) & n_doorway(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))