People walking along a lake with houses in the distance.
The people are surfing on the lake.
People cannot be walking and surfing at the same time.
exists e1 x1 x2 x3 x4 x5.(n_distance(x5) & a_topic(x1) & in(e1,x5) & along(e1,x3) & with(x3,x4) & n_house(x4) & n_lake(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(n_lake(x2) & n_people(x1) & on(e1,x2) & Actor(e1,x1) & v_surf(e1))