With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Within
this
context
,
he
addressed
the
issue
of
the
Eastern
Romance
substratum
.
Within:O
this:O
context:O
,:O
he:O
addressed:O
the:O
issue:O
of:O
the:O
Eastern:O
Romance:location-GPE
substratum:O
.:O