With no explanation, label each line with "product-airplane", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
,
the
company
acquired
Boeing
767
aircraft
for
conversion
to
freighters
.
In:O
,:O
the:O
company:O
acquired:O
Boeing:product-airplane
767:product-airplane
aircraft:O
for:O
conversion:O
to:O
freighters:O
.:O