s --> np, vp.

np --> det, n.
np --> pn.

vp --> vi.
vp --> vt, np.


%% Lexicon

det --> [a].
det --> [the].

n --> [bride].
n --> [nurse].
n --> [yakuza].
n --> [whiskey].

pn --> [bill].
pn --> [gogo].

vi --> [whistles].
vi --> [fights].

vt --> [drinks].
vt --> [kills].