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
1870
edition
contained
940
pages
,
but
this
had
increased
to
over
2,100
pages
by
1892
.
The:O
1870:O
edition:O
contained:O
940:O
pages:O
,:O
but:O
this:O
had:O
increased:O
to:O
over:O
2,100:O
pages:O
by:O
1892:O
.:O