With no explanation, label each line with "O", "location-mountain", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Tephra
erupted
from
Sand
Mountain
Volcanic
Field
and
Belknap
forms
a
thick
blanket
across
Santiam
Pass
and
near
McKEnzie
Pass
,
with
radiocarbon
dating
ages
of
3,440
±
250
to
1,600
years
B.P
.
Tephra:O
erupted:O
from:O
Sand:location-other
Mountain:location-other
Volcanic:location-other
Field:location-other
and:O
Belknap:location-mountain
forms:O
a:O
thick:O
blanket:O
across:O
Santiam:location-other
Pass:location-other
and:O
near:O
McKEnzie:location-other
Pass:location-other
,:O
with:O
radiocarbon:O
dating:O
ages:O
of:O
3,440:O
±:O
250:O
to:O
1,600:O
years:O
B.P:O
.:O