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 ":".
The
Shatt
al-Arab
was
considered
an
important
channel
for
both
states
'
oil
exports
,
and
in
1937
,
Iran
and
the
newly
independent
Iraq
signed
a
treaty
to
settle
the
dispute
.
The:O
Shatt:location-bodiesofwater
al-Arab:location-bodiesofwater
was:O
considered:O
an:O
important:O
channel:O
for:O
both:O
states:O
':O
oil:O
exports:O
,:O
and:O
in:O
1937:O
,:O
Iran:location-GPE
and:O
the:O
newly:O
independent:O
Iraq:O
signed:O
a:O
treaty:O
to:O
settle:O
the:O
dispute:O
.:O