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 ":".
Users
communicate
with
other
gadgets
via
a
remote
call
to
a
common
third
party
server
.
Users:O
communicate:O
with:O
other:O
gadgets:O
via:O
a:O
remote:O
call:O
to:O
a:O
common:O
third:O
party:O
server:O
.:O