People are walking the marathon for a cause.
The people are in a hurry.
Just because people are walking the marathon doesn't imply they are in a hurry.
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 p1 x1.(n_people(x1) & exists x2.(in(x1,x2) & n_hurry(x2)))