With no explanation, label each line with "O", "location-island", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
is
estimated
that
Surtsey
will
remain
above
sea
level
for
another
100
years
.
It:O
is:O
estimated:O
that:O
Surtsey:location-island
will:O
remain:O
above:O
sea:O
level:O
for:O
another:O
100:O
years:O
.:O