With no explanation, label each line with "O", "person-artist/author", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Britten
had
a
close
friendship
with
Wulff
Scherchen
(
son
of
the
conductor
Hermann
Scherchen
,
and
later
known
as
John
Woolford
)
whom
he
met
when
Wulff
was
14
and
Britten
21
.
Britten:person-artist/author
had:O
a:O
close:O
friendship:O
with:O
Wulff:person-other
Scherchen:person-other
(:O
son:O
of:O
the:O
conductor:O
Hermann:person-artist/author
Scherchen:person-artist/author
,:O
and:O
later:O
known:O
as:O
John:person-artist/author
Woolford:person-artist/author
):O
whom:O
he:O
met:O
when:O
Wulff:person-other
was:O
14:O
and:O
Britten:person-artist/author
21:O
.:O