With no explanation, label each line with "location-GPE", "person-soldier", "O", "person-scholar", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Niles
surmised
that
the
carol
had
been
transplanted
from
England
via
the
shape
note
singing
tradition
,
although
this
version
of
the
carol
has
not
been
found
elsewhere
and
there
is
reason
to
believe
that
Niles
,
a
prolific
composer
,
actually
wrote
it
himself
.
Niles:person-soldier
surmised:O
that:O
the:O
carol:O
had:O
been:O
transplanted:O
from:O
England:location-GPE
via:O
the:O
shape:O
note:O
singing:O
tradition:O
,:O
although:O
this:O
version:O
of:O
the:O
carol:O
has:O
not:O
been:O
found:O
elsewhere:O
and:O
there:O
is:O
reason:O
to:O
believe:O
that:O
Niles:person-scholar
,:O
a:O
prolific:O
composer:O
,:O
actually:O
wrote:O
it:O
himself:O
.:O