With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Together
,
they
achieved
success
when
they
invented
the
X-Acto
knife
.
Together:O
,:O
they:O
achieved:O
success:O
when:O
they:O
invented:O
the:O
X-Acto:product-other
knife:O
.:O