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 ":".
Sixteen
production
wells
are
connected
to
two
wellhead
platforms
.
Sixteen:O
production:O
wells:O
are:O
connected:O
to:O
two:O
wellhead:O
platforms:O
.:O