Somewhat more involved 
( Somewhat ( more involved ) )
(ROOT (S (VP (VB Somewhat) (ADJP (RBR more) (VBN involved)))))
This is a little more involved.
( This ( ( is ( ( ( a little ) more ) involved ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (ADJP (ADVP (NP (DT a) (RB little)) (RBR more)) (VBN involved))) (. .)))