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:
Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,000 sq ft), could produce up to 22,700 L (5,000 imp gal; 6,000 US gal) per day and operate for 40 years. Individual still designs include single-slope, double-slope (or greenhouse type), vertical, conical, inverted absorber, multi-wick, and multiple effect. These stills can operate in passive, active, or hybrid modes. Double-slope stills are the most economical for decentralized domestic purposes, while active multiple effect units are more suitable for large-scale applications.
answer:
In what year was a large scale solar distillation project constructed in Las Salinas?

question:
Institutes in Hyderabad include the National Institute of Rural Development, the Indian School of Business, the Institute of Public Enterprise, the Administrative Staff College of India and the Sardar Vallabhbhai Patel National Police Academy. Technical and engineering schools include the International Institute of Information Technology, Hyderabad (IIITH), Birla Institute of Technology and Science, Pilani Hyderabad (BITS Hyderabad) and Indian Institute of Technology, Hyderabad (IIT-H) as well as agricultural engineering institutes such as the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) and the Acharya N. G. Ranga Agricultural University. Hyderabad also has schools of fashion design including Raffles Millennium International, NIFT Hyderabad and Wigan and Leigh College. The National Institute of Design, Hyderabad (NID-H), will offer undergraduate and postgraduate courses from 2015.
answer:
What type of school is Raffles Millennium International?

question:
The brain generally forms a ring round the pharynx (throat), consisting of a pair of ganglia (local control centers) above and in front of the pharynx, linked by nerve cords either side of the pharynx to another pair of ganglia just below and behind it. The brains of polychaetes are generally in the prostomium, while those of clitellates are in the peristomium or sometimes the first segment behind the peristomium. In some very mobile and active polychaetes the brain is enlarged and more complex, with visible hindbrain, midbrain and forebrain sections. The rest of the central nervous system is generally "ladder-like", consisting of a pair of nerve cords that run through the bottom part of the body and have in each segment paired ganglia linked by a transverse connection. From each segmental ganglion a branching system of local nerves runs into the body wall and then encircles the body. However, in most polychaetes the two main nerve cords are fused, and in the tube-dwelling genus Owenia the single nerve chord has no ganglia and is located in the epidermis.
answer:
What are ganglia?