With no explanation, label each line with "location-GPE", "product-airplane", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
plane
involved
in
the
crash
was
a
Tupolev
Tu-154
operated
by
Russian
airline
Baikal
Airlines
.
The:O
plane:O
involved:O
in:O
the:O
crash:O
was:O
a:O
Tupolev:product-airplane
Tu-154:product-airplane
operated:O
by:O
Russian:location-GPE
airline:O
Baikal:organization-company
Airlines:organization-company
.:O