The category "<i_f_v>" can be expressed as follows:
anti tank brdm
anti tank brdms
antitank lav
antitank lavs
armored car
armored cars
bm21 mlrs
bm21 mlrses
bm21 mrl
bm21 mrls
bmp2
bmp2 c2
bmp2 c2s
bmp2 command
bmp2 commands
bmp2k
bmp2ks
bmp2s
bradley
bradley infantry fighting vehicle with stinger
bradley infantry fighting vehicle with stingers
bradleys
brdm with a t
brdm with atgm
brdm2
brdm2 recon
brdm2 reconnaissance
brdm2 reconnaissances
brdm2 recons
brdm2s
brdm3
brdm3s
brdms with a t
brdms with atgm
btr-60 c2
btr-60 c2s
btr-60 command and control
btr-60 command and controls
c2 lar
c2 lars
lar
lar m
lar mortar
lar mortars
lar ms
lar with a mortar
lar with a mortars
lar with mortar
lar with mortars
lars
lav
lav 25
lav 25s
lav a t
lav a ts
lav c2
lav c2s
lav m
lav mortar
lav mortars
lav ms
lav r
lav rs
lav with a mortar
lav with a mortars
lav with mortar
lav with mortars
lavs
light armored vehicle
light armored vehicles
m2
m2 stinger
m2 stingers
m2s
mlrs bm21
mlrs bm21s
mrl bm21
mrl bm21s
mt-lb
mt-lb with 82mm mortar
mt-lb with 82mm mortars
mt-lb with eighty two mortar
mt-lb with eighty two mortars
mt-lbs
opfor apc
opfor apcs
opfor armored personnel carrier
opfor armored personnel carriers
opfor medium mortar
opfor medium mortars
recon
reconnaissance
reconnaissances
recons
reinforced m2
reinforced m2s
self propelled 82mm mortar
self propelled 82mm mortars
self propelled eighty two mortar
self propelled eighty two mortars
skurka
skurkas
sp 82mm mortar
sp 82mm mortars
sp eighty two mortar
sp eighty two mortars
swa apc
swa apcs
swa armored personnel carrier
swa armored personnel carriers
swa bm21
swa bm21s
swa btr-60 pu
swa btr-60 pus
swa ifv
swa ifv command
swa ifv commands
swa ifvs
swa mt-lb with 82mm mortar
swa mt-lb with 82mm mortars
swa mt-lb with eighty two mortar
swa mt-lb with eighty two mortars
swa zpu-4
swa zpu-4s
swa zsu23-4
swa zsu23-4m
swa zsu23-4ms
swa zsu23-4s
swa zu23-2
swa zu23-2s
zpu
zpus
zsu23-4
zsu23-4m
zsu23-4ms
zsu23-4s