With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
studied
in
Athens
and
Paris
natural
sciences
.
He:O
studied:O
in:O
Athens:location-GPE
and:O
Paris:location-GPE
natural:O
sciences:O
.:O