With no explanation, label each line with "O", "location-road/railway/highway/transit", "location-mountain", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Some
high
and
rugged
passes
may
have
tunnels
bored
underneath
a
nearby
mountainside
(
like
the
Eisenhower
Tunnel
bypassing
Loveland
Pass
in
the
Rockies
)
to
allow
faster
traffic
flow
throughout
the
year
.
Some:O
high:O
and:O
rugged:O
passes:O
may:O
have:O
tunnels:O
bored:O
underneath:O
a:O
nearby:O
mountainside:O
(:O
like:O
the:O
Eisenhower:location-other
Tunnel:location-other
bypassing:O
Loveland:location-road/railway/highway/transit
Pass:location-road/railway/highway/transit
in:O
the:O
Rockies:location-mountain
):O
to:O
allow:O
faster:O
traffic:O
flow:O
throughout:O
the:O
year:O
.:O