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 ":".
They
have
also
released
28
concerts
as
digital
downloads
through
their
own
digital
store
.
They:O
have:O
also:O
released:O
28:O
concerts:O
as:O
digital:O
downloads:O
through:O
their:O
own:O
digital:O
store:O
.:O