With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Some
researchers
speculate
the
cause
to
be
dependent
on
dilution
,
decreased
production
of
platelets
,
or
an
increased
turnover
event
.
Some:O
researchers:O
speculate:O
the:O
cause:O
to:O
be:O
dependent:O
on:O
dilution:O
,:O
decreased:O
production:O
of:O
platelets:other-biologything
,:O
or:O
an:O
increased:O
turnover:O
event:O
.:O