With no explanation, label each line with "O", "person-actor", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Terra
was
officially
announced
as
a
part
of
the
cast
in
March
2002
.
Terra:person-actor
was:O
officially:O
announced:O
as:O
a:O
part:O
of:O
the:O
cast:O
in:O
March:O
2002:O
.:O