A man opens a gate in front of a train.
A man near a train.
Front of a train is near a train.
exists e1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_train(x4) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_open(e1) & n_gate(x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & near(x1,x2) & n_train(x2) & n_man(x1))