Task: Question Generation
Input (English): Carnivore was an electronic eavesdropping software system implemented by the FBI during the Clinton administration; it was designed to monitor email and electronic communications. After prolonged negative coverage in the press, the FBI changed the name of its system from "Carnivore" to "DCS1000." DCS is reported to stand for "Digital Collection System"; the system has the same functions as before. The Associated Press reported in mid-January 2005 that the FBI essentially abandoned the use of Carnivore in 2001, in favor of commercially available software, such as NarusInsight.
Output (English): What kind of software replaced Carnivore?