With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Their
ability
to
aid
and
protect
the
humans
convinces
Stella
that
they
are
indeed
a
Celestrian
.
Their:O
ability:O
to:O
aid:O
and:O
protect:O
the:O
humans:O
convinces:O
Stella:person-other
that:O
they:O
are:O
indeed:O
a:O
Celestrian:O
.:O