Man sitting by blue doors.
A person is sitting.
A man is a person.
exists e1 s1 x1 x2 x3.(a_topic(x1) & by(e1,x3) & n_door(x3) & a_blue(s1) & Theme(s1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))