Four children do backbends in the park.
Some old people are reading newspapers.
Children and old people are different ages. One cannot be doing backbends and reading at the same time.
exists e1 x1 x2 x3.(n_park(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_backbend(x2) & n_child(x1) & card_eq_4(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_newspaper(x2) & n_people(x1) & a_old(s1) & Theme(s1,x1))