[Q]: Sentence: By the 11th century, every province throughout the Islamic world had these industrial mills in operation, from al-Andalus and North Africa to the Middle East and Central Asia. Question: In what century had mills such as gristmills and sawmills dominate the Islamic world?
++++++++++
[A]: yes

[Q]: Sentence: This custom was discontinued in 1969 and the investiture now takes place with the scarlet biretta. Question: What does the pope now wear when naming a new Cardinal?
++++++++++
[A]: yes

[Q]: Sentence: This is in contrast to some (largely communist or ex-communist) countries where not only are there provisions for air defence in the army, navy and air force but there are specific branches that deal only with the air defence of territory, for example, the Soviet PVO Strany. Question: What type of countries have set branches for territorial air defence?
++++++++++
[A]:
yes