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:
(The Ms 6.1 earthquake on August 30, 2008 in southern Sichuan was not part of this series because it was caused by a different fault. See 2008 Panzhihua earthquake for details.)
answer:
When did this earthquake occur?


question:
Paper is often characterized by weight. In the United States, the weight assigned to a paper is the weight of a ream, 500 sheets, of varying "basic sizes", before the paper is cut into the size it is sold to end customers. For example, a ream of 20 lb, 8.5 in × 11 in (216 mm × 279 mm) paper weighs 5 pounds, because it has been cut from a larger sheet into four pieces. In the United States, printing paper is generally 20 lb, 24 lb, or 32 lb at most. Cover stock is generally 68 lb, and 110 lb or more is considered card stock.
answer:
What characteristic is paper usually classified by?


question:
Montevideo is the heartland of retailing in Uruguay. The city has become the principal centre of business and real estate, including many expensive buildings and modern towers for residences and offices, surrounded by extensive green spaces. In 1985, the first shopping centre in Rio de la Plata, Montevideo Shopping was built. In 1994, with building of three more shopping complexes such as the Shopping Tres Cruces, Portones Shopping, and Punta Carretas Shopping, the business map of the city changed dramatically. The creation of shopping complexes brought a major change in the habits of the people of Montevideo. Global firms such as McDonald's and Burger King etc. are firmly established in Montevideo.
answer:

What is the heartland of retailing in Uruguay?