Given the following passage "Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.", answer the following question. Note that the answer is present within the text. Question: What is the third component of a web browser mentioned in the text?
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Answer: rendering engine

Given the following passage "The Byzantine Empire ruled the northern shores of the Sahara from the 5th to the 7th centuries. After the Muslim conquest of Arabia (Arabian peninsula) the Muslim conquest of North Africa began in the mid-7th to early 8th centuries, Islamic influence expanded rapidly on the Sahara. By the end of 641 all of Egypt was in Muslim hands. The trade across the desert intensified. A significant slave trade crossed the desert. It has been estimated that from the 10th to 19th centuries some 6,000 to 7,000 slaves were transported north each year.", answer the following question. Note that the answer is present within the text. Question: At what point was the key river on the continent controlled?
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Answer: By the end of 641

Given the following passage "Wood has been an important construction material since humans began building shelters, houses and boats. Nearly all boats were made out of wood until the late 19th century, and wood remains in common use today in boat construction. Elm in particular was used for this purpose as it resisted decay as long as it was kept wet (it also served for water pipe before the advent of more modern plumbing).", answer the following question. Note that the answer is present within the text. Question: What's an example of something people have made out of wood?
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Answer:
houses