With no explanation, label each line with "location-GPE", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Following
the
townhouse
deaths
,
many
members
of
Weatherman
went
into
hiding
,
forming
Weather
Underground
Organization
,
said
to
be
responsible
for
a
series
of
bombings
of
US
state
and
federal
buildings
between
1970
and
1975
.
Following:O
the:O
townhouse:O
deaths:O
,:O
many:O
members:O
of:O
Weatherman:O
went:O
into:O
hiding:O
,:O
forming:O
Weather:organization-other
Underground:organization-other
Organization:organization-other
,:organization-other
said:O
to:O
be:O
responsible:O
for:O
a:O
series:O
of:O
bombings:O
of:O
US:location-GPE
state:O
and:O
federal:O
buildings:O
between:O
1970:O
and:O
1975:O
.:O