I want to know the answer to the following question:
Who has used programs such as Carnivore and NarusInsight to eavesdrop on the systems of internet service providers?
All the background I'm provided with is that "For instance, programs such as Carnivore and NarusInsight have been used by the FBI and NSA to eavesdrop on the systems of internet service providers.". Is that enough to answer the question?