People waiting for the subway.
People waiting
A subway is something you see people waiting for. It is a less specific rephrase of "people waiting for the subway."
exists e1 x1 x2 x3.(n_subway(x3) & a_topic(x1) & for(e1,x3) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_people(x1))