A crowd of people are waiting in line.
people at work
People waiting in line are not usually at work.
exists e1 x1 x2 x3.(in(e1,x3) & n_line(x3) & Actor(e1,x1) & v_wait(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists x1 x2.(a_topic(x1) & at(x1,x2) & n_work(x2) & n_people(x1))