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 ":".
Thark
is
a
farce
by
the
English
playwright
Ben
Travers
.
Thark:art-other
is:O
a:O
farce:O
by:O
the:O
English:location-GPE
playwright:O
Ben:person-artist/author
Travers:person-artist/author
.:O