A man is sitting on a train resting his hand against his face.
A person on a train thinking hard.
A man resting his hand against his face is not necessarily thinking hard.
exists e1 e2 x1 x2 x3 x4.(for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_rest(e2) & against(x3,x4) & n_face(x4) & of(x4,x1) & n_male(x1) & n_male(x1) & n_hand(x3) & of(x3,x1) & on(e1,x2) & n_train(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & on(x1,x2) & a_hard(s1) & Manner(e1,s1) & Actor(e1,x3) & v_think(e1) & (x2 = x3) & n_train(x2) & n_person(x1))