With no explanation, label each line with "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Between
the
years
1997
and
2001
,
long
Biafo
Glacier
thickened
mid-glacier
,
however
it
did
not
advance
.
Between:O
the:O
years:O
1997:O
and:O
2001:O
,:O
long:O
Biafo:location-other
Glacier:location-other
thickened:O
mid-glacier:O
,:O
however:O
it:O
did:O
not:O
advance:O
.:O