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.

Sumerian cities during the Uruk period were probably theocratic and were most likely headed by a priest-king (ensi), assisted by a council of elders, including both men and women. It is quite possible that the later Sumerian pantheon was modeled upon this political structure. There was little evidence of organized warfare or professional soldiers during the Uruk period, and towns were generally unwalled. During this period Uruk became the most urbanized city in the world, surpassing for the first time 50,000 inhabitants.
What is an "ensi"?

New Haven is repeatedly referenced by Nick Carraway in F. Scott Fitzgerald's literary classic The Great Gatsby, as well as by fellow fictional Yale alumnus C. Montgomery Burns, a character from The Simpsons television show. A fictional native of New Haven is Alex Welch from the novella, The Odd Saga of the American and a Curious Icelandic Flock. The TV show Gilmore Girls is set (but not filmed) in New Haven and at Yale University, as are scenes in the film The Sisterhood of the Traveling Pants 2 (2008).
In what Fitzgerald classic does the fictional protagonist make repeated references to New Haven?

Nanjing is an important railway hub in eastern China. It serves as rail junction for the Beijing-Shanghai (Jinghu) (which is itself composed of the old Jinpu and Huning Railways), Nanjing–Tongling Railway (Ningtong), Nanjing–Qidong (Ningqi), and the Nanjing-Xian (Ningxi) which encompasses the Hefei–Nanjing Railway. Nanjing is connected to the national high-speed railway network by Beijing–Shanghai High-Speed Railway and Shanghai–Wuhan–Chengdu Passenger Dedicated Line, with several more high-speed rail lines under construction.
Nanjing's railway is important, and is located in what region of China?