The rules that use the vocabulary item "tank" are:

<i_f_v-sing>

anti tank brdm

<i_f_v-pl>

anti tank brdms

<tank>

tank

<tank_type-pl>

swa t72 tank c2s

swa t72 tank command and controls

swa t72 tank commands

<tank-sing>

tank

<tank_type>

swa t72 tank c2

swa t72 tank c2s

swa t72 tank command

swa t72 tank command and control

swa t72 tank command and controls

swa t72 tank commands

<i_f_v>

anti tank brdm

anti tank brdms

<tank_type-sing>

swa t72 tank c2

swa t72 tank command

swa t72 tank command and control