With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
However
,
Tajikistan
closed
their
southern
border
,
leaving
many
refugees
trapped
on
islands
in
the
Panj
River
which
forms
the
border
between
the
two
countries
.
However:O
,:O
Tajikistan:location-GPE
closed:O
their:O
southern:O
border:O
,:O
leaving:O
many:O
refugees:O
trapped:O
on:O
islands:O
in:O
the:O
Panj:location-GPE
River:location-GPE
which:O
forms:O
the:O
border:O
between:O
the:O
two:O
countries:O
.:O