A young man prepares some hamburgers on a grill in the backyard.
The man is sitting on his sofa.
A young man  is more descriptive than the man  which can mean any age.
exists e1 s1 x1 x2 x3 x4.(n_backyard(x4) & Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1) & on(x2,x3) & in(x3,x4) & n_grill(x3) & n_hamburger(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_sofa(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))