With no explanation, label each line with "location-GPE", "O", "product-food", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
is
a
tradition
to
have
Ouzo
in
authentic
Greek
restaurants
as
an
aperitif
,
served
in
a
shot
glass
,
and
deeply
chilled
before
the
meal
is
started
.
It:O
is:O
a:O
tradition:O
to:O
have:O
Ouzo:product-food
in:O
authentic:O
Greek:location-GPE
restaurants:O
as:O
an:O
aperitif:O
,:O
served:O
in:O
a:O
shot:O
glass:O
,:O
and:O
deeply:O
chilled:O
before:O
the:O
meal:O
is:O
started:O
.:O