With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
still
maintains
an
aviation
maintenance
shop
with
its
sister
company
Elite
Aviation
.
It:O
still:O
maintains:O
an:O
aviation:O
maintenance:O
shop:O
with:O
its:O
sister:O
company:O
Elite:organization-company
Aviation:organization-company
.:O