With no explanation, label each line with "location-GPE", "O", "organization-education", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Endovascular
coiling
was
introduced
by
Italian
neurosurgeon
Guido
Guglielmi
at
UCLA
in
1989
.
Endovascular:O
coiling:O
was:O
introduced:O
by:O
Italian:location-GPE
neurosurgeon:O
Guido:person-other
Guglielmi:person-other
at:O
UCLA:organization-education
in:O
1989:O
.:O