With no explanation, label each line with "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Nagata
and
Nakanishi
feuded
with
Kojima
and
Tenzan
for
several
months
,
but
were
unable
to
regain
the
title
.
Nagata:person-athlete
and:O
Nakanishi:person-athlete
feuded:O
with:O
Kojima:person-athlete
and:O
Tenzan:person-athlete
for:O
several:O
months:O
,:O
but:O
were:O
unable:O
to:O
regain:O
the:O
title:O
.:O