A group of people are running a marathon.
The people are running.
The people is specifically a group of people.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_run(e1) & n_marathon(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_run(e1))