Problem: Does "The film is based on Vengeance, a book by Canadian journalist George Jonas." answer the question "What book was 'Munich' based on?"

A: yes

Problem: Does "In the 1480s this Portuguese explorer reached the Congo River and the lands of Bakongo, setting up the foundations of modern Angola, some 4200 km down the African coast from Guinea-Bissau." answer the question "What was the name of the Portuguese explorer?"

A: no

Problem: Does "Two methods, the Gram stain and the acid-fast stain, are the standard approaches used to classify bacteria and to diagnosis of disease." answer the question "What is Geimsa stain?"

A:
no