With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
A
noted
musicologist
,
her
work
on
Franz
Schubert
and
Hugo
Wolf
is
considered
some
of
the
most
scholarly
and
useful
material
on
these
composers
.
A:O
noted:O
musicologist:O
,:O
her:O
work:O
on:O
Franz:person-artist/author
Schubert:person-artist/author
and:O
Hugo:person-artist/author
Wolf:person-artist/author
is:O
considered:O
some:O
of:O
the:O
most:O
scholarly:O
and:O
useful:O
material:O
on:O
these:O
composers:O
.:O