# clauses
S -> NP VP
S -> Interj NP VP
NP -> Det N
NP -> Det N that VP
NP -> Det Adj N
VP -> Vtrans NP   # transitive verbs have direct objects
VP -> Vintr       # intransitive verbs have no direct object
#
# Steven's modifications below
#
S -> S Conj S
VP -> VP PP
PP -> P NP
VP -> AdvP Vtrans NP  # transitive verbs have direct objects
VP -> AdvP Vintr  # intransitive verbs have no direct object
AdvP -> Adv
AdvP -> Adv Conj Adv
VP -> Quote " S "

# terminals
Interj -> oh, | my, | wow, | damn,
Det -> this | that | the
N -> amoeba | dichotomy | seagull | trombone | corsage | restaurant | suburb | walrus | sea | time | thing
Adj -> bald | smug | important | tame | overstaffed | luxurious | blue | boiling hot
Vtrans -> computes | examines | foregrounds | prefers | interprets | spins 
Vintr -> coughs | daydreams | whines | slobbers | vocalizes | sneezes | has come
#
# Steven's modifications below
#
Conj -> and | or | yet | but
Adv -> quickly | quietly | slowly | tediously | habitually
P -> around | through | over | in | by | for | of
Quote -> said | thought | yelled