With no explanation, label each line with "O", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
1970s
saw
the
War
College
's
most
active
expansion
,
with
the
opening
of
three
separate
buildings
.
The:O
1970s:O
saw:O
the:O
War:organization-education
College:organization-education
's:O
most:O
active:O
expansion:O
,:O
with:O
the:O
opening:O
of:O
three:O
separate:O
buildings:O
.:O