guy instructing people in back of train.
A man orchestrates the train.
The fact that a guy is instructing people in back of train doesn't imply orchestrates the train.
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 x1 x2.(n_train(x2) & Theme(e1,x2) & Actor(e1,x1) & v_orchestrate(e1) & n_man(x1))