A man piloting a boat with goods in the back.
A man is on a train.
One cannot be piloting a boat inside a train.
exists e1 x1 x2 x3 x4 x5.(n_back(x5) & a_topic(x1) & in(e1,x5) & Theme(e1,x3) & Actor(e1,x2) & v_pilot(e1) & with(x3,x4) & n_goods(x4) & n_boat(x3) & (x1 = x2) & n_man(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_train(x2)) & n_man(x1))