A toddler has his hands on his face.
toddler while playing keeps hand on his face
A toddler has his hands on his face does not imply it is while playing.
exists e1 x1 x2 x3.(on(e1,x3) & n_face(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_hand(x2) & of(x2,x1) & n_toddler(x1))
exists e1 e2 x1 x2 x3 x4.(while(e2,e1) & Actor(e2,x3) & v_keep(e2) & on(x3,x4) & n_face(x4) & of(x4,x1) & n_male(x1) & n_hand(x3) & Time(e1,x2) & n_toddler(x2) & Actor(e1,x1) & v_play(e1) & n_thing(x1))