A child is cleaning his room.
A child is doing something in his room.
The child is not just doing something but cleaning.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & n_room(x2) & of(x2,x1) & n_male(x1) & n_child(x1))
exists e1 x1 x2 x3.(in(e1,x3) & n_room(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_thing(x2) & n_child(x1))