Task: Question Generation
Input (English): Passage: Pakistani President Pervez Musharraf - then as Chief of Army Staff - was responsible for sending thousands of Pakistanis to fight alongside the Taliban and Bin Laden against the forces of Massoud. In total there were believed to be 28,000 Pakistani nationals fighting inside Afghanistan. 20,000 were regular Pakistani soldiers either from the Frontier Corps or army and an estimated 8,000 were militants recruited in madrassas filling regular Taliban ranks. The estimated 25,000 Taliban regular force thus comprised more than 8,000 Pakistani nationals. A 1998 document by the U.S. State Department confirms that "20-40 percent of [regular] Taliban soldiers are Pakistani." The document further states that the parents of those Pakistani nationals "know nothing regarding their childs military involvement with the Taliban until their bodies are brought back to Pakistan." A further 3,000 fighter of the regular Taliban army were Arab and Central Asian militants. From 1996 to 2001 the Al Qaeda of Osama Bin Laden and Ayman al-Zawahiri became a state within the Taliban state. Bin Laden sent Arab recruits to join the fight against the United Front. Of roughly 45,000 Pakistani, Taliban and Al Qaeda soldiers fighting against the forces of Massoud only 14,000 were Afghan.
Output (English): For how many years was Al Qaeda considered a state within the Taliban state?