With no explanation, label each line with "O", "art-other", "art-broadcastprogram", "art-film", "art-music", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
(
Who
Will
Pay
the
Trousers
?
)
(:O
Who:art-other
Will:art-other
Pay:art-other
the:art-other
Trousers:art-other
?:art-other
):O