Such parties may include
( ( Such parties ) ( may include ) )
(ROOT (S (NP (JJ Such) (NNS parties)) (VP (MD may) (VP (VB include)))))
Parties could or could not include
( Parties ( ( ( ( could or ) could ) not ) include ) )
(ROOT (S (NP (NNS Parties)) (VP (MD could) (CC or) (MD could) (RB not) (VP (VB include)))))