With no explanation, label each line with "O", "other-god", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Sometimes
they
are
referred
to
as
water
nymphs
having
been
born
from
the
four
sacred
springs
on
Helicon
which
flowed
from
the
ground
after
Pegasus
,
the
winged
horse
,
stamped
his
hooves
on
the
ground
.
Sometimes:O
they:O
are:O
referred:O
to:O
as:O
water:O
nymphs:O
having:O
been:O
born:O
from:O
the:O
four:O
sacred:O
springs:O
on:O
Helicon:O
which:O
flowed:O
from:O
the:O
ground:O
after:O
Pegasus:other-god
,:O
the:O
winged:O
horse:O
,:O
stamped:O
his:O
hooves:O
on:O
the:O
ground:O
.:O