These people are demonstrating for their leader.
The leader is watching these people.
demonstrating for their leader  almost the same as leader is watching
exists e1 x1 x2.(n_leader(x2) & of(x2,x1) & n_thing(x1) & n_people(x1) & for(e1,x2) & Actor(e1,x1) & v_demonstrate(e1))
exists e1 x1 x2.(n_people(x2) & n_leader(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1))