People are walking in a building where food is being sold.
the people are looking to find food
Walking in to a building with food implies the people are looking for 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 p1 x1.(n_people(x1) & Topic(e1,p1) & Actor(e1,x1) & v_look(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_find(e2) & n_food(x2)))