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
transfusions
were
to
increase
red
blood
cells
in
riders
'
blood
,
thus
taking
more
oxygen
to
their
muscles
.
The:O
transfusions:O
were:O
to:O
increase:O
red:O
blood:O
cells:O
in:O
riders:O
':O
blood:O
,:O
thus:O
taking:O
more:O
oxygen:O
to:O
their:O
muscles:O
.:O