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 ":".
Similarly
,
when
the
Soviet
Union
collapsed
,
many
of
the
Jews
in
the
affected
territory
(
who
had
been
refuseniks
)
were
suddenly
allowed
to
leave
.
Similarly:O
,:O
when:O
the:O
Soviet:location-GPE
Union:location-GPE
collapsed:O
,:O
many:O
of:O
the:O
Jews:O
in:O
the:O
affected:O
territory:O
(:O
who:O
had:O
been:O
refuseniks:O
):O
were:O
suddenly:O
allowed:O
to:O
leave:O
.:O