A man in green is watching a train go by.
A family sits at the kitchen table eating.
The subject is either a man or family. Usually one wouldn't be watching a train from one's kitchen table.
exists e1 s1 x1 x2 x3 x4.(a_by(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_watch(e1) & n_go(x3) & of(x3,x4) & n_train(x4) & in(x1,x2) & n_green(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_eating(x2) & of(x2,x4) & n_table(x4) & of(x2,x3) & n_kitchen(x3) & at(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_family(x1))