With no explanation, label each line with "art-writtenart", "O", "building-theater", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "building-airport" preceded by ":".
According
to
the
American
music
critic
Henry
Pleasants
,
the
author
of
``
The
Great
Singers
from
the
Dawn
of
Opera
to
Our
Own
Time
``
(
first
published
1967
)
,
she
gave
between
25
and
35
performances
each
season
at
the
Met
alone
.
According:O
to:O
the:O
American:O
music:O
critic:O
Henry:person-artist/author
Pleasants:person-artist/author
,:O
the:O
author:O
of:O
``:O
The:art-writtenart
Great:art-writtenart
Singers:art-writtenart
from:art-writtenart
the:art-writtenart
Dawn:art-writtenart
of:art-writtenart
Opera:art-writtenart
to:art-writtenart
Our:art-writtenart
Own:art-writtenart
Time:art-writtenart
``:O
(:O
first:O
published:O
1967:O
):O
,:O
she:O
gave:O
between:O
25:O
and:O
35:O
performances:O
each:O
season:O
at:O
the:O
Met:building-theater
alone:O
.:O