S -> NP VP | WhQ | YNQ | IMP | S Conj S | S AdvP 

VP -> V | V NP | V NP PP | V PP | V S | VP Conj VP | Modal VP | V To VP | AdvP VP | VP AdvP | VP NP NP | V AdjP | v PP PP

NP -> PRP | N | PRPS N | Det N | Det AdjP N | Det N PP | NP PP | NP RelClause | PropN | Quant N | CD N | Det| NP Conj NP | N PP | N S

PP -> P NP | P S

WhQ -> WH_Word VP | WH_Word AUX NP VP | WH_Word AUX NP

YNQ -> AUX NP VP | BE NP | BE NP Adj | BE NP NP | BE NP PP | DO NP VP | MD NP VP

IMP -> V NP | V | V PP

RelClause -> WDT VP | WP VP | NP VP | WDT NP VP | WP NP VP | PP WDT VP            

Det -> DT | PDT | WDT | PPRS | CD | DT | DT DT 

Adj -> JJ | JJR | JJS

Adv -> RB | RBR | RBS | WRB

Conj -> CC| IN

Modal -> MD

To -> TO

PropN -> NNP | NNPS

Quant -> CD | DT

N -> NN | NNS | NNP | NNPS| CD

V -> VB | VBD | VBG | VBN | VBP | VBZ

P -> IN

WH_Word -> WRB | WP | WDT

DO -> VBP | VBZ | VBD

BE -> VBZ | VBP | VBD | VB | VBN | VBG

AUX -> MD | DO | BE | VBP | VBZ | VBD

AdvP -> Adv | Adv Adv | AdvP Conj AdvP | PP| AdvP PP

AdjP -> Adj | Adv Adj | AdjP Conj AdjP | AdjP PP