Two elderly people sit in handicapped chairs on a train.
The people  have a cane or a walker
People sit in handicapped chairs for reasons that do not involve a cane or walker.
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_train(x3) & in(e1,x2) & n_chair(x2) & a_handicapped(s2) & Theme(s2,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & a_elderly(s1) & Theme(s1,x1) & card_eq_2(x1))
exists x1.(n_people(x1) & (exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_cane(x2)) | exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & n_walker(x3))))