With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
medieval
European
usage
,
a
sergeant
was
simply
any
attendant
or
officer
with
a
protective
duty
.
In:O
medieval:O
European:location-GPE
usage:O
,:O
a:O
sergeant:O
was:O
simply:O
any:O
attendant:O
or:O
officer:O
with:O
a:O
protective:O
duty:O
.:O