Extract the answer to the question from the following context. Question: What does the extra piece that is attached offer? Context: A servo system differs from some stepper motor applications in that the position feedback is continuous while the motor is running; a stepper system relies on the motor not to "miss steps" for short term accuracy, although a stepper system may include a "home" switch or other element to provide long-term stability of control. For instance, when a typical dot matrix computer printer starts up, its controller makes the print head stepper motor drive to its left-hand limit, where a position sensor defines home position and stops stepping. As long as power is on, a bidirectional counter in the printer's microprocessor keeps track of print-head position.
----
Answer: long-term stability of control


Extract the answer to the question from the following context. Question: What type of land is the area that the Muslims carried out their successful conquest? Context: 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: desert


Extract the answer to the question from the following context. Question: Did Buddhism advance during the second or first portion of the century preceding the 21st? Context: A number of modern movements or tendencies in Buddhism emerged during the second half of the 20th Century, including the Dalit Buddhist movement (also sometimes called 'neo-Buddhism'), Engaged Buddhism, and the further development of various Western Buddhist traditions.
----
Answer:
second