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 ":".
Visiting
delegations
of
international
human
rights
organizations
at
the
time
found
him
``
a
source
of
accurate
information
about
those
who
were
attacked
at
the
PRD
headquarters
``
.
Visiting:O
delegations:O
of:O
international:O
human:O
rights:O
organizations:O
at:O
the:O
time:O
found:O
him:O
``:O
a:O
source:O
of:O
accurate:O
information:O
about:O
those:O
who:O
were:O
attacked:O
at:O
the:O
PRD:location-GPE
headquarters:location-GPE
``:O
.:O