With no explanation, label each line with "building-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
oldest
rocks
visible
in
Devils
Tower
National
Monument
were
laid
down
in
a
shallow
sea
during
the
mid-
to
late-Triassic
period
,
225
to
195
million
years
ago
.
The:O
oldest:O
rocks:O
visible:O
in:O
Devils:building-other
Tower:building-other
National:building-other
Monument:building-other
were:O
laid:O
down:O
in:O
a:O
shallow:O
sea:O
during:O
the:O
mid-:O
to:O
late-Triassic:O
period:O
,:O
225:O
to:O
195:O
million:O
years:O
ago:O
.:O