With no explanation, label each line with "location-GPE", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Self-defence
measures
included
various
ECM
systems
,
as
well
as
either
the
AIM-4
Falcon
(
Swedish
designation
``
RB
28
``
)
or
AIM-9
Sidewinder
(
Swedish
designation
``
RB
24
``
)
air-to-air
missiles
.
Self-defence:O
measures:O
included:O
various:O
ECM:O
systems:O
,:O
as:O
well:O
as:O
either:O
the:O
AIM-4:product-weapon
Falcon:product-weapon
(:O
Swedish:location-GPE
designation:O
``:O
RB:product-weapon
28:product-weapon
``:O
):O
or:O
AIM-9:product-weapon
Sidewinder:product-weapon
(:O
Swedish:location-GPE
designation:O
``:O
RB:product-weapon
24:product-weapon
``:O
):O
air-to-air:O
missiles:O
.:O