of a film that are still looking for a common through-line 
(ROOT (PP (IN of) (NP (NP (DT a) (NN film)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADVP (RB still)) (VP (VBG looking) (PP (IN for) (NP (DT a) (JJ common) (IN through) (HYPH -) (NN line))))))))))
(ROOT (PP (IN ) (NP (NP (DT ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBP ) (ADVP (RB )) (VP (VBG ) (PP (IN ) (NP (DT ) (JJ ) (IN ) (HYPH ) (NN ))))))))))