an overwhelming sadness that feels as if it has made its way into your very bloodstream 
(ROOT (NP (NP (DT an) (JJ overwhelming) (NN sadness)) (SBAR (WHNP (WDT that)) (S (VP (VBZ feels) (SBAR (IN as) (IN if) (S (NP (PRP it)) (VP (VBZ has) (VP (VBN made) (NP (PRP$ its) (NN way)) (PP (IN into) (NP (PRP$ your) (JJ very) (NN bloodstream))))))))))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (SBAR (IN ) (IN ) (S (NP (PRP )) (VP (VBZ ) (VP (VBN ) (NP (PRP$ ) (NN )) (PP (IN ) (NP (PRP$ ) (JJ ) (NN ))))))))))))