People are walking the marathon for a cause.
Some of the people walking in the marathon are afflicted with the cause that they are supporting.
All people walking for a cause doesn't mean they are afflicted with the cause they are supporting.
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 e3 e2 x1 x2 x3 x4 x5 x6.(n_thing(x4) & n_cause(x5) & n_marathon(x4) & n_people(x2) & with(e2,x5) & Theme(e3,x6) & Actor(e3,x4) & v_support(e3) & (x5 = x6) & Theme(e2,x1) & v_afflict(e2) & of(x1,x2) & in(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_thing(x1))