With no explanation, label each line with "location-GPE", "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-hospital" preceded by ":".
San
Francisco
International
Airport
is
geographically
located
in
San
Mateo
County
,
but
it
is
owned
and
operated
by
the
City
and
County
of
San
Francisco
.
San:building-airport
Francisco:building-airport
International:building-airport
Airport:building-airport
is:O
geographically:O
located:O
in:O
San:location-GPE
Mateo:location-GPE
County:O
,:O
but:O
it:O
is:O
owned:O
and:O
operated:O
by:O
the:O
City:O
and:O
County:O
of:O
San:location-GPE
Francisco:location-GPE
.:O