With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
further
extension
of
the
Moscow
dominion
was
facilitated
by
the
death
of
Casimir
IV
in
1492
,
when
Poland
and
Lithuania
once
again
parted
company
.
The:O
further:O
extension:O
of:O
the:O
Moscow:location-GPE
dominion:O
was:O
facilitated:O
by:O
the:O
death:O
of:O
Casimir:person-politician
IV:person-politician
in:O
1492:O
,:O
when:O
Poland:location-GPE
and:O
Lithuania:location-GPE
once:O
again:O
parted:O
company:O
.:O