instruction:
This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
question:
Israel has nine public universities that are subsidized by the state and 49 private colleges. The Hebrew University of Jerusalem, Israel's second-oldest university after the Technion, houses the National Library of Israel, the world's largest repository of Judaica and Hebraica. The Technion, the Hebrew University, and the Weizmann Institute consistently ranked among world's 100 top universities by the prestigious ARWU academic ranking. The Hebrew University of Jerusalem and Tel Aviv University are ranked among the world's top 100 universities by Times Higher Education magazine. Other major universities in the country include Bar-Ilan University, the University of Haifa, The Open University, and Ben-Gurion University of the Negev. Ariel University, in the West Bank, is the newest university institution, upgraded from college status, and the first in over thirty years. Israel's seven research universities (excluding the Open University) are consistently ranked among top 500 in the world.
answer:
How many public universities does Israel have?


question:
Occupancy sensors to allow operation for whenever someone is within the area being scanned can control lighting. When motion can no longer be detected, the lights shut off. Passive infrared sensors react to changes in heat, such as the pattern created by a moving person. The control must have an unobstructed view of the building area being scanned. Doors, partitions, stairways, etc. will block motion detection and reduce its effectiveness. The best applications for passive infrared occupancy sensors are open spaces with a clear view of the area being scanned. Ultrasonic sensors transmit sound above the range of human hearing and monitor the time it takes for the sound waves to return. A break in the pattern caused by any motion in the area triggers the control. Ultrasonic sensors can see around obstructions and are best for areas with cabinets and shelving, restrooms, and open areas requiring 360-degree coverage. Some occupancy sensors utilize both passive infrared and ultrasonic technology, but are usually more expensive. They can be used to control one lamp, one fixture or many fixtures.
answer:
What sensor controls light with motion sensors? 


question:
Since 2006, $9 billion has been invested in downtown and surrounding neighborhoods; $5.2 billion of that in has come in 2013 and 2014. Construction activity, particularly rehabilitation of historic downtown buildings, has increased markedly. The number of vacant downtown buildings has dropped from nearly 50 to around 13.[when?] Among the most notable redevelopment projects are the Book Cadillac Hotel and the Fort Shelby Hotel; the David Broderick Tower; and the David Whitney Building. Meanwhile, work is underway or set to begin on the historic, vacant Wurlitzer Building and Strathmore Hotel.[citation needed]
answer:
How much has been invested in Detroit since 2006?