drown yourself in a lake afterwards 
(ROOT (S (VP (VB drown) (NP (PRP yourself)) (PP (IN in) (NP (DT a) (NN lake))) (ADVP (RB afterwards)))))
(ROOT (S (VP (VB ) (NP (PRP )) (PP (IN ) (NP (DT ) (NN ))) (ADVP (RB )))))