A young man sits on a couch and smokes.
A man is eating.
smoking and eating are two different activities.
exists e1 s1 x1 x2 x3 x4.(on(e1,x2) & subset_of(x4,x2) & n_smoke(x4) & subset_of(x3,x2) & n_couch(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_eat(e1) & n_man(x1))