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 ":".
Flight
315
departed
London
Heathrow
International
Airport
for
Reykjavík
at
21:48
GMT
.
Flight:O
315:O
departed:O
London:building-airport
Heathrow:building-airport
International:building-airport
Airport:building-airport
for:O
Reykjavík:location-GPE
at:O
21:48:O
GMT:O
.:O