Many people are walking along side an old steam engine.
Humans near a train.
People are humans. If they are walking along side something, they are near it. A steam engine is a type of train.
exists e1 s1 x1 x2 x3 x4.(along(e1,x4) & n_side(x4) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_engine(x2) & of(x2,x3) & n_steam(x3) & a_old(s1) & Theme(s1,x2) & n_people(x1) & n_quantity(x1))
exists s1 x1.(ne_nam_humans(s1) & a_topic(s1) & near(s1,x1) & n_train(x1))