With no explanation, label each line with "O", "organization-other", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
was
first
seen
by
the
Belgian
Antarctic
Expedition
,
1897–99
,
under
Adrien
de
Gerlache
.
It:O
was:O
first:O
seen:O
by:O
the:O
Belgian:organization-other
Antarctic:organization-other
Expedition:organization-other
,:O
1897–99:O
,:O
under:O
Adrien:person-other
de:person-other
Gerlache:person-other
.:O