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 ":".
Their
main
hub
is
located
at
Southwest
Florida
International
Airport
in
Fort
Myers
,
Florida
.
Their:O
main:O
hub:O
is:O
located:O
at:O
Southwest:building-airport
Florida:building-airport
International:building-airport
Airport:building-airport
in:O
Fort:location-GPE
Myers:location-GPE
,:O
Florida:location-GPE
.:O