With no explanation, label each line with "location-GPE", "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Combining
his
forces
with
2,000
troops
sent
from
allied
states
,
Cnemus
moved
against
the
Acarnanian
city
of
Stratus
.
Combining:O
his:O
forces:O
with:O
2,000:O
troops:O
sent:O
from:O
allied:O
states:O
,:O
Cnemus:person-soldier
moved:O
against:O
the:O
Acarnanian:location-GPE
city:O
of:O
Stratus:location-GPE
.:O