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 ":".
They
reveal
to
Lyra
that
Asriel
and
Mrs
Coulter
are
actually
her
parents
.
They:O
reveal:O
to:O
Lyra:person-other
that:O
Asriel:person-other
and:O
Mrs:person-other
Coulter:person-other
are:O
actually:O
her:O
parents:O
.:O