With no explanation, label each line with "O", "location-bodiesofwater", "other-law", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
One
of
the
aims
of
the
Chamizal
Convention
was
to
build
a
man-made
channel
to
prevent
the
Rio
Grande
from
blurring
the
international
boundary
ever
again
.
One:O
of:O
the:O
aims:O
of:O
the:O
Chamizal:other-law
Convention:other-law
was:O
to:O
build:O
a:O
man-made:O
channel:O
to:O
prevent:O
the:O
Rio:location-bodiesofwater
Grande:location-bodiesofwater
from:O
blurring:O
the:O
international:O
boundary:O
ever:O
again:O
.:O