bother thinking it all through 
(ROOT (S (VP (VB bother) (S (VP (VBG thinking) (NP (NP (PRP it)) (NP (DT all))) (PRT (RB through)))))))
(ROOT (S (VP (VB ) (S (VP (VBG ) (NP (NP (PRP )) (NP (DT ))) (PRT (RB )))))))