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 ":".
-
``
Dream
``
)
(
the
largest
operational
aircraft
in
the
world
)
.
-:O
``:O
Dream:product-airplane
``:O
):O
(:O
the:O
largest:O
operational:O
aircraft:O
in:O
the:O
world:O
):O
.:O