With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
15
cardinals
ineligible
to
participate
in
both
1978
conclaves
were
:
The:O
15:O
cardinals:O
ineligible:O
to:O
participate:O
in:O
both:O
1978:O
conclaves:O
were:O
::O