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

<specific_vehicle_type-pl>

school buses

swa school buses

<specific_vehicle_type-sing>

school bus

swa school bus

<specific_vehicle_type-not_creatable-pl>

school buses

swa school buses

<specific_vehicle_type-creatable-sing>

school bus

swa school bus

<specific_vehicle_type-not_creatable-sing>

school bus

swa school bus

<specific_vehicle_type-not_creatable>

school bus

school buses

swa school bus

swa school buses