A group of people are running a marathon.
The people are running a marathon to raise money for charity.
A group of people running a marathon isn't necessarily to raise money for charity.
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 p1 x1 x2.(n_people(x1) & Topic(e1,p1) & exists e2 x3 x4.(for(e2,x4) & n_charity(x4) & Theme(e2,x3) & Actor(e2,x1) & v_raise(e2) & n_money(x3)) & Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & n_marathon(x2))