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 ":".
He
died
a
year
later
in
Warsaw
.
He:O
died:O
a:O
year:O
later:O
in:O
Warsaw:location-GPE
.:O