People are walking in a building where food is being sold.
the building is selling drinks only
If they are selling drinks only then they will not be selling food.
exists e1 p1 x1 x2.(in(e1,x2) & exists e2 x3.(Theme(e2,x3) & v_sell(e2) & n_food(x3)) & where(x2,p1) & n_building(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 s1 x1 x2.(n_building(x1) & a_only(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_sell(e1) & n_drink(x2))