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 ":".
During
its
course
,
it
temporarily
merges
with
the
Kiso
and
Nagara
Rivers
.
During:O
its:O
course:O
,:O
it:O
temporarily:O
merges:O
with:O
the:O
Kiso:location-bodiesofwater
and:O
Nagara:location-bodiesofwater
Rivers:location-bodiesofwater
.:O