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 ":".
By
the
early
1890s
the
original
building
had
tripled
in
size
.
By:O
the:O
early:O
1890s:O
the:O
original:O
building:O
had:O
tripled:O
in:O
size:O
.:O