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 ":".
Whilst
discussing
the
role
,
Frigg
passes
the
countess
'
castle
and
decides
to
use
it
as
the
base
of
the
radio
station
.
Whilst:O
discussing:O
the:O
role:O
,:O
Frigg:person-other
passes:O
the:O
countess:O
':O
castle:O
and:O
decides:O
to:O
use:O
it:O
as:O
the:O
base:O
of:O
the:O
radio:O
station:O
.:O