He went down on his knees, examining it minutely, even going so far as to smell it. 
( He ( ( ( ( ( went down ) ( on ( his knees ) ) ) , ) ( ( ( ( ( examining it ) minutely ) , ) even ) ( ( going ( so ( far as ) ) ) ( to ( smell it ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD went) (PRT (RP down)) (PP (IN on) (NP (PRP$ his) (NNS knees))) (, ,) (S (VP (VP (VBG examining) (NP (PRP it)) (ADVP (RB minutely))) (, ,) (ADVP (RB even)) (VP (VBG going) (ADVP (RB so) (RB far) (RB as)) (S (VP (TO to) (VP (VB smell) (NP (PRP it))))))))) (. .)))
It smelled like eggs. 
( It ( ( smelled ( like eggs ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD smelled) (PP (IN like) (NP (NNS eggs)))) (. .)))