With no explanation, label each line with "location-GPE", "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
To
the
north
across
the
Mekong
river
is
the
Lao
province
Vientiane
Prefecture
.
To:O
the:O
north:O
across:O
the:O
Mekong:location-bodiesofwater
river:location-bodiesofwater
is:O
the:O
Lao:location-GPE
province:location-GPE
Vientiane:location-GPE
Prefecture:location-GPE
.:O