With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Warren
Bechtel
died
unexpectedly
in
1933
while
in
Moscow
on
business
.
Warren:person-other
Bechtel:person-other
died:O
unexpectedly:O
in:O
1933:O
while:O
in:O
Moscow:location-GPE
on:O
business:O
.:O