Man sleeping on train with briefcase on lap.
A man fell a sleep while doing work on a train
A man sleeping on a train with his briefcase on his lap implies that he was doing work.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & with(e1,x4) & on(x4,x5) & n_lap(x5) & n_briefcase(x4) & on(e1,x3) & n_train(x3) & Actor(e1,x2) & v_sleep(e1) & (x1 = x2) & n_man(x1))
exists e1 e2 x1 x2 x3 x4.(while(e1,e2) & on(e2,x4) & n_train(x4) & Theme(e2,x3) & Actor(e2,x1) & v_do(e2) & n_work(x3) & Theme(e1,x2) & Actor(e1,x1) & v_fall(e1) & n_sleep(x2) & n_man(x1))