if you 're in the mood for something more comfortable than challenging 
(ROOT (SBAR (IN if) (S (NP (PRP you)) (VP (VBP 're) (PP (IN in) (NP (NP (DT the) (NN mood)) (PP (IN for) (NP (NP (NN something)) (ADJP (ADJP (RBR more) (JJ comfortable)) (PP (IN than) (FRAG (ADJP (VBG challenging)))))))))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (NN )) (ADJP (ADJP (RBR ) (JJ )) (PP (IN ) (FRAG (ADJP (VBG )))))))))))))