As black as it is, Heathers has the same theme as the Ringwald/Cusack movies.
( ( As ( black ( as ( it is ) ) ) ) ( , ( Heathers ( ( has ( ( the ( same theme ) ) ( as ( the ( Ringwald/Cusack movies ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN As) (NP (NP (JJ black)) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ is)))))) (, ,) (NP (NNP Heathers)) (VP (VBZ has) (NP (NP (DT the) (JJ same) (NN theme)) (PP (IN as) (NP (DT the) (NNP Ringwald/Cusack) (NNS movies))))) (. .)))
Heathers was a wonderful dark comedy 
( Heathers ( was ( a ( wonderful ( dark comedy ) ) ) ) )
(ROOT (SINV (ADVP (RB Heathers)) (VBD was) (NP (DT a) (JJ wonderful) (JJ dark) (NN comedy))))