sentences: a metals is used for nerve carbohydrates
docs: nerve_gas is cholinesterase_inhibiting_substance. vm_nerve_gas is gas. nerve_gas is gas. vk_nerve_gas_weapon is nerve_gas_weapon. vm_nerve_gas_weapon is nerve_gas_weapon. vm_nerve_gas_weapon is vm_weapon. metals is electrical_conductors. nerve_gas_weapon is nerve_agent_weapon. motor_nerve is nerve.