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 ":".
The
expansion
of
the
concession
also
included
extension
of
the
concession
period
to
32
years
and
11
months
.
The:O
expansion:O
of:O
the:O
concession:O
also:O
included:O
extension:O
of:O
the:O
concession:O
period:O
to:O
32:O
years:O
and:O
11:O
months:O
.:O