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 ":".
On
the
Rink
they
host
under
18
nights
,
family
sessions
and
even
entertainment
.
On:O
the:O
Rink:O
they:O
host:O
under:O
18:O
nights:O
,:O
family:O
sessions:O
and:O
even:O
entertainment:O
.:O