With no explanation, label each line with "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Desaguadero
River
is
the
main
collector
,
receiving
waters
from
the
Bermejo
,
Vinchina
and
Salado
before
reaching
the
Colorado
River
.
The:O
Desaguadero:location-bodiesofwater
River:location-bodiesofwater
is:O
the:O
main:O
collector:O
,:O
receiving:O
waters:O
from:O
the:O
Bermejo:location-bodiesofwater
,:O
Vinchina:location-bodiesofwater
and:O
Salado:location-bodiesofwater
before:O
reaching:O
the:O
Colorado:location-bodiesofwater
River:location-bodiesofwater
.:O