With no explanation, label each line with "O", "event-disaster", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Spectator
safety
at
football
grounds
was
a
major
concern
during
the
1980s
,
following
incidents
of
hooliganism
,
and
disasters
such
as
the
Bradford
City
stadium
fire
and
the
Heysel
Stadium
disaster
in
1985
,
and
the
Hillsborough
disaster
in
1989
.
Spectator:O
safety:O
at:O
football:O
grounds:O
was:O
a:O
major:O
concern:O
during:O
the:O
1980s:O
,:O
following:O
incidents:O
of:O
hooliganism:O
,:O
and:O
disasters:O
such:O
as:O
the:O
Bradford:event-disaster
City:event-disaster
stadium:event-disaster
fire:event-disaster
and:O
the:O
Heysel:event-disaster
Stadium:event-disaster
disaster:event-disaster
in:O
1985:O
,:O
and:O
the:O
Hillsborough:event-disaster
disaster:event-disaster
in:O
1989:O
.:O