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
propeller
speed
is
relatively
low
,
at
about
90
revolutions
per
minute
,
although
it
depends
on
the
size
of
the
propeller
.
The:O
propeller:O
speed:O
is:O
relatively:O
low:O
,:O
at:O
about:O
90:O
revolutions:O
per:O
minute:O
,:O
although:O
it:O
depends:O
on:O
the:O
size:O
of:O
the:O
propeller:O
.:O