This train is yellow and gravel sits beside it.
There is a yellow train at rest on the tracks.
The train is not necessarily at rest on the tracks.
exists e1 s1 x1 x2.(n_thing(x1) & n_train(x1) & beside(e1,x1) & Actor(e1,x2) & v_sit(e1) & n_gravel(x2) & Theme(s1,x1) & a_yellow(s1))
exists p1 x1 x4.(n_track(x4) & exists s1 x2 x3.((x1 = x2) & on(x2,x4) & at(x2,x3) & n_rest(x3) & n_train(x2) & a_yellow(s1) & Theme(s1,x2)))