With no explanation, label each line with "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-hospital" or "building-hotel" preceded by ":".
As
of
October
2010
,
San
Diego
International
Airport
is
served
by
20
passenger
airlines
.
As:O
of:O
October:O
2010:O
,:O
San:building-airport
Diego:building-airport
International:building-airport
Airport:building-airport
is:O
served:O
by:O
20:O
passenger:O
airlines:O
.:O