With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Attempts
to
register
accounts
with
usernames
alluding
to
Ai
Weiwei
were
blocked
.
Attempts:O
to:O
register:O
accounts:O
with:O
usernames:O
alluding:O
to:O
Ai:person-artist/author
Weiwei:person-artist/author
were:O
blocked:O
.:O