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 ":".
-
Continued
research
and
publishing
and
participation
in
conferences
on
energy
matters
.
-:O
Continued:O
research:O
and:O
publishing:O
and:O
participation:O
in:O
conferences:O
on:O
energy:O
matters:O
.:O