s::=np vp
np::= pn | det adjs n
pn::= Bob | Kat | Dubs | AMERICA | Harry
adj::=huge|nice|clumsy
adjs::=adj|adj adjs
det::=the|a|that|this
n::=cat|dog|ferret|house|car|state
vp::=iv|tv np
iv::=died|jumped|killed|slept
tv::=killed|liked|licked|writes|defenestrates