With no explanation, label each line with "location-GPE", "O", "building-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
is
the
second-largest
hydroelectric
contributor
to
the
power
system
in
Iraq
behind
the
Mosul
Dam
.
It:O
is:O
the:O
second-largest:O
hydroelectric:O
contributor:O
to:O
the:O
power:O
system:O
in:O
Iraq:location-GPE
behind:O
the:O
Mosul:building-other
Dam:building-other
.:O