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 ":".
Wi-Fi
service
is
available
at
this
station
.
Wi-Fi:O
service:O
is:O
available:O
at:O
this:O
station:O
.:O