With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
With
Scotland
threatening
to
descend
into
civil
war
,
King
Edward
I
of
England
was
invited
in
by
the
Scottish
nobility
to
arbitrate
.
With:O
Scotland:location-GPE
threatening:O
to:O
descend:O
into:O
civil:O
war:O
,:O
King:O
Edward:person-politician
I:person-politician
of:O
England:location-GPE
was:O
invited:O
in:O
by:O
the:O
Scottish:location-GPE
nobility:O
to:O
arbitrate:O
.:O