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 ":".
Unable
at
the
moment
to
expand
his
borders
,
he
might
have
seen
the
alliance
as
a
way
to
secure
his
own
borders
from
Latin
invasion
.
Unable:O
at:O
the:O
moment:O
to:O
expand:O
his:O
borders:O
,:O
he:O
might:O
have:O
seen:O
the:O
alliance:O
as:O
a:O
way:O
to:O
secure:O
his:O
own:O
borders:O
from:O
Latin:location-GPE
invasion:O
.:O