Three people standing at a station.
People are waiting for the next train.
Just because people are standing in a station does not mean they are waiting for a train.
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_station(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists e1 s1 x1 x2.(n_train(x2) & a_next(s1) & Theme(s1,x2) & for(e1,x2) & Actor(e1,x1) & v_wait(e1) & n_people(x1))