A person is sitting on the couch, holding a large bottle of alcohol.
A person is sitting down with a drink.
"Sitting down" is a rephrasing of "sitting on the couch." Alcohol is a form of drink.
exists e1 e2 s1 x1 x2 x3 x4.(n_couch(x2) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hold(e2) & of(x3,x4) & n_alcohol(x4) & n_bottle(x3) & a_large(s1) & Theme(s1,x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_person(x1))
exists e1 s1 x1 x2.(with(e1,x2) & n_drink(x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_person(x1))