Two elderly people sit in handicapped chairs on a train.
The two older folks are sitting and reading magazines.
Reading magazines is not an activity indicated by being on a age, ability status, or presence on a train.  There are other possible activities.
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 e2 e1 s1 s2 x1 x2.(n_folk(x1) & r_more(s2) & a_older(s2) & Theme(s2,x1) & card_eq_2(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1) & Theme(e2,x2) & Actor(e2,x1) & v_read(e2) & n_magazine(x2) & Actor(e1,x1) & v_sit(e1))