People walk in a building near a set of stairs.
People enter the museum.
A museum may not have stairs.
exists e1 x1 x2 x3 x4.(in(e1,x2) & near(x2,x3) & of(x3,x4) & n_stair(x4) & n_set(x3) & n_building(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2.(n_museum(x2) & Theme(e1,x2) & Actor(e1,x1) & v_enter(e1) & n_people(x1))