def METHOD_NAME(action):
    if action in neutral_actions:
        return None
    elif action in activation_actions:
        return Activation
    elif action in inhibition_actions:
        return Inhibition
    elif action in decrease_amount_actions:
        return DecreaseAmount
    elif action in increase_amount_actions:
        return IncreaseAmount
    elif action == 'N/A':
        return Inhibition
    else:
        return None