many people wait for the train.
The people are waiting for the train.
Many people refers to the people.
exists e1 x1 x2.(n_train(x2) & for(e1,x2) & Actor(e1,x1) & v_wait(e1) & n_people(x1) & n_quantity(x1))
exists e1 x1 x2.(n_train(x2) & n_people(x1) & for(e1,x2) & Actor(e1,x1) & v_wait(e1))