Does the sentence "Sassou Nguesso is backed by his own Congolese Labour Party (French: Parti Congolais du Travail) as well as a range of smaller parties." provide a valid answer to the question "What kind of political system has existed in Congo-Brazzaville since the '90s?"

A: no

Does the sentence "His administration insisted that the U.S. and U.K. remove their military bases from Libya, with Gaddafi proclaiming that "the armed forces which rose to express the people's revolution [will not] tolerate living in their shacks while the bases of imperialism exist in Libyan territory." provide a valid answer to the question "In what month and year did the United States remove its military bases from Libya?"

A: no

Does the sentence "Liberia has the highest ratio of foreign direct investment to GDP in the world, with US$16 billion in investment since 2006." provide a valid answer to the question "Liberia has the highest ratio of what?"

A: yes

Does the sentence "The family who returned the city to Christianity were called the Hautevilles, including Robert Guiscard and his army, who is regarded as a hero by the natives." provide a valid answer to the question "Who is considered a hero by natives for ending Muslim control of Palermo?"

A:
yes