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
conventional
book
supply
is
complemented
by
numerous
electronic
services
,
such
as
3,000
commercial
scientific
journals
that
can
be
accessed
via
e-journal
.
The:O
conventional:O
book:O
supply:O
is:O
complemented:O
by:O
numerous:O
electronic:O
services:O
,:O
such:O
as:O
3,000:O
commercial:O
scientific:O
journals:O
that:O
can:O
be:O
accessed:O
via:O
e-journal:O
.:O