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 ":".
After
school
he
entered
the
cadet
flying
school
in
Dęblin
.
After:O
school:O
he:O
entered:O
the:O
cadet:O
flying:O
school:O
in:O
Dęblin:location-GPE
.:O