With no explanation, label each line with "location-GPE", "O", "person-artist/author", "art-other", "art-broadcastprogram", "art-film", "art-music", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Hans
Werner
Henze
based
on
it
his
opera
``
Der
Prinz
von
Homburg
``
,
in
three
acts
,
first
performed
in
Hamburg
in
1960
.
Hans:person-artist/author
Werner:person-artist/author
Henze:person-artist/author
based:O
on:O
it:O
his:O
opera:O
``:O
Der:art-other
Prinz:art-other
von:art-other
Homburg:art-other
``:O
,:O
in:O
three:O
acts:O
,:O
first:O
performed:O
in:O
Hamburg:location-GPE
in:O
1960:O
.:O