With no explanation, label each line with "location-GPE", "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Kaloyan
Stefanov
Mahlyanov
,
best
known
as
Kotoōshū
Katsunori
,
has
become
well-known
worldwide
for
his
sumo
prowess
,
becoming
the
first
European
to
earn
the
title
ozeki
in
Japan
.
Kaloyan:person-athlete
Stefanov:person-athlete
Mahlyanov:person-athlete
,:O
best:O
known:O
as:O
Kotoōshū:person-athlete
Katsunori:person-athlete
,:O
has:O
become:O
well-known:O
worldwide:O
for:O
his:O
sumo:O
prowess:O
,:O
becoming:O
the:O
first:O
European:location-GPE
to:O
earn:O
the:O
title:O
ozeki:O
in:O
Japan:location-GPE
.:O