With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
He
retained
this
membership
until
the
eleventh
legislative
period
which
would
end
in
1991
.
He:O
retained:O
this:O
membership:O
until:O
the:O
eleventh:O
legislative:O
period:O
which:O
would:O
end:O
in:O
1991:O
.:O