People in a bar drinking.
People are consuming alcohol.
People drinking in a bar refers to consuming alcohol.
exists x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_drinking(x2) & of(x2,x3) & n_bar(x3) & n_people(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_consume(e1) & n_alcohol(x2) & n_people(x1))