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 ":".
This
was
due
particularly
to
the
simultaneous
presence
of
a
unique
collection
of
exceptional
sources
and
scholars
.
This:O
was:O
due:O
particularly:O
to:O
the:O
simultaneous:O
presence:O
of:O
a:O
unique:O
collection:O
of:O
exceptional:O
sources:O
and:O
scholars:O
.:O