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 ":".
At
the
same
time
,
between
1990
and
1998
,
he
regularly
attended
the
Ars
musica
contemporary
music
festival
composition
seminars
and
workshops
,
with
the
participation
of
Luciano
Berio
,
Witold
Lutosławski
,
György
Ligeti
,
Pierre
Boulez
,
Karlheinz
Stockhausen
,
Brian
Ferneyhough
,
Pascal
Dusapin
,
Iannis
Xenakis
,
Magnus
Lindberg
,
Luca
Francesconi
and
Wolfgang
Rihm
.
At:O
the:O
same:O
time:O
,:O
between:O
1990:O
and:O
1998:O
,:O
he:O
regularly:O
attended:O
the:O
Ars:O
musica:O
contemporary:O
music:O
festival:O
composition:O
seminars:O
and:O
workshops:O
,:O
with:O
the:O
participation:O
of:O
Luciano:person-artist/author
Berio:person-artist/author
,:O
Witold:person-artist/author
Lutosławski:person-artist/author
,:O
György:person-artist/author
Ligeti:person-artist/author
,:O
Pierre:person-artist/author
Boulez:person-artist/author
,:O
Karlheinz:person-artist/author
Stockhausen:person-artist/author
,:O
Brian:person-artist/author
Ferneyhough:person-artist/author
,:O
Pascal:person-artist/author
Dusapin:person-artist/author
,:O
Iannis:person-artist/author
Xenakis:person-artist/author
,:O
Magnus:person-artist/author
Lindberg:person-artist/author
,:O
Luca:person-artist/author
Francesconi:person-artist/author
and:O
Wolfgang:person-artist/author
Rihm:person-artist/author
.:O