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 ":".
During
the
war
,
the
offices
were
renamed
.
During:O
the:O
war:O
,:O
the:O
offices:O
were:O
renamed:O
.:O