People on a subway read their newspapers.
humans inside
People are humans and subways are inside.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_read(e1) & n_newspaper(x3) & of(x3,x1) & n_thing(x1) & on(x1,x2) & n_subway(x2) & n_people(x1))
exists x1.(a_topic(x1) & r_inside(x1) & n_human(x1))