that while cleverly worked out , can not overcome blah characters 
(ROOT (SBAR (IN that) (S (SBAR (IN while) (S (ADVP (RB cleverly)) (VP (VBN worked) (PRT (RP out))))) (, ,) (VP (MD can) (RB not) (VP (VB overcome) (NP (JJ blah) (NNS characters)))))))
(ROOT (SBAR (IN ) (S (SBAR (IN ) (S (ADVP (RB )) (VP (VBN ) (PRT (RP ))))) (, ) (VP (MD ) (RB ) (VP (VB ) (NP (JJ ) (NNS )))))))