With no explanation, label each line with "location-GPE", "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-hospital" preceded by ":".
In
February
2007
,
it
started
services
from
a
second
hub
at
Chiang
Mai
International
Airport
(
ex-primary
hub
)
,
servicing
routes
to
Pai
and
Nan
.
In:O
February:O
2007:O
,:O
it:O
started:O
services:O
from:O
a:O
second:O
hub:O
at:O
Chiang:location-GPE
Mai:location-GPE
International:building-airport
Airport:building-airport
(:O
ex-primary:O
hub:O
):O
,:O
servicing:O
routes:O
to:O
Pai:location-GPE
and:location-GPE
Nan:location-GPE
.:O