With no explanation, label each line with "product-airplane", "O", "organization-other", "event-other", "location-GPE", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
In
April
2015
,
``
Ambush
``
participated
in
Exercise
Joint
Warrior
,
the
largest
military
exercise
held
in
Europe
,
alongside
55
other
naval
ships
of
NATO
navies
.
In:O
April:O
2015:O
,:O
``:O
Ambush:product-airplane
``:O
participated:O
in:O
Exercise:event-other
Joint:event-other
Warrior:event-other
,:O
the:O
largest:O
military:O
exercise:O
held:O
in:O
Europe:location-GPE
,:O
alongside:O
55:O
other:O
naval:O
ships:O
of:O
NATO:organization-other
navies:O
.:O