People are walking the marathon for a cause.
People are raising awareness for cancer through a marathon.
All people walking a marathon for a cause doesn't mean they are raising awareness for cancer.
exists e1 x1 x2 x3.(n_marathon(x2) & for(e1,x3) & n_cause(x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2 x3 x4.(through(e1,x4) & n_marathon(x4) & Theme(e1,x2) & Actor(e1,x1) & v_raise(e1) & for(x2,x3) & n_cancer(x3) & n_awareness(x2) & n_people(x1))