With no explanation, label each line with "product-airplane", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Contract
students
from
Air
China
fly
both
of
the
University
's
King
Air
aircraft
,
the
BE-90B
.
Contract:O
students:O
from:O
Air:organization-company
China:organization-company
fly:O
both:O
of:O
the:O
University:O
's:O
King:O
Air:O
aircraft:O
,:O
the:O
BE-90B:product-airplane
.:O