With no explanation, label each line with "location-GPE", "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
General
George
S.
Patton
used
the
city
of
Luxembourg
as
headquarters
.
General:O
George:person-soldier
S.:person-soldier
Patton:person-soldier
used:O
the:O
city:O
of:O
Luxembourg:location-GPE
as:O
headquarters:O
.:O