guy instructing people in back of train.
A man tells people in the back of the train to move to the front.
Guy instructing people in back of train not necessarily tells people in the back to move to the front.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x4) & of(x4,x5) & n_train(x5) & n_back(x4) & Theme(e1,x3) & Actor(e1,x2) & v_instruct(e1) & n_people(x3) & (x1 = x2) & n_guy(x1))
exists e1 p1 x1 x2 x3 x4 x5.(n_front(x5) & n_train(x4) & n_back(x3) & Topic(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_tell(e1) & exists e2.(to(e2,x5) & Actor(e2,x2) & v_move(e2)) & in(x2,x3) & of(x3,x4) & n_people(x2) & n_man(x1))