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
favourite
was
still
among
a
group
of
sixteen
horses
who
still
held
serious
chances
with
four
fences
to
jump
but
he
made
a
mistake
at
the
27th
and
was
always
struggling
to
get
back
on
terms
with
those
at
the
head
of
the
group
.
The:O
favourite:O
was:O
still:O
among:O
a:O
group:O
of:O
sixteen:O
horses:O
who:O
still:O
held:O
serious:O
chances:O
with:O
four:O
fences:O
to:O
jump:O
but:O
he:O
made:O
a:O
mistake:O
at:O
the:O
27th:O
and:O
was:O
always:O
struggling:O
to:O
get:O
back:O
on:O
terms:O
with:O
those:O
at:O
the:O
head:O
of:O
the:O
group:O
.:O