A man sits in front of his laptop.
A person is sitting.
A man is a person sitting in front of a laptop
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_laptop(x3) & of(x3,x1) & n_male(x1) & n_front(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))