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 ":".
Further
restoration
was
undertaken
in
the
1950s
.
Further:O
restoration:O
was:O
undertaken:O
in:O
the:O
1950s:O
.:O