A group of people walking through the woods.
A group of people on a bird watching trip.
People walking through the woods does not necessarily imply that they are on bird watching trip.
exists e1 x1 x2 x3 x4.(n_wood(x4) & a_topic(x1) & of(x1,x2) & through(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x5) & Actor(e1,x4) & v_watch(e1) & n_trip(x5) & (x1 = x4) & on(x1,x3) & n_bird(x3) & of(x1,x2) & n_people(x2) & n_group(x1))