With no explanation, label each line with "O", "event-disaster", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Naoto
Kan
took
an
increasingly
anti-nuclear
stance
in
the
months
following
the
Fukushima
disaster
.
Naoto:person-other
Kan:person-other
took:O
an:O
increasingly:O
anti-nuclear:O
stance:O
in:O
the:O
months:O
following:O
the:O
Fukushima:event-disaster
disaster:event-disaster
.:O