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.
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Question: Like the rest of India, Hyderabad has a large informal economy that employs 30% of the labour force.:71 According to a survey published in 2007, it had 4050,000 street vendors, and their numbers were increasing.:9 Among the street vendors, 84% are male and 16% female,:12 and four fifths are "stationary vendors" operating from a fixed pitch, often with their own stall.:1516 Most are financed through personal savings; only 8% borrow from moneylenders.:19 Vendor earnings vary from 50 (74 US) to 800 (US$12) per day.:25 Other unorganised economic sectors include dairy, poultry farming, brick manufacturing, casual labour and domestic help. Those involved in the informal economy constitute a major portion of urban poor.:71

Answer: What percentage of Hyderabad's employed are employed informally?

Question: Upon being confirmed in 1966, she adopted Veronica as a confirmation name. She was raised in the Detroit suburbs of Pontiac and Avon Township (now Rochester Hills). Months before her mother died of breast cancer, Madonna noticed changes in her behavior and personality, although she did not understand the reason. Her mother was at a loss to explain her medical condition, and often began to cry when Madonna questioned her about it. Madonna later acknowledged that she had not grasped the concept of her mother dying.

Answer: Which name did Madonna adopted as her confirmation name?

Question: The most catastrophic earthquakes we know of occurred in 31 BCE, 363, 749, and 1033 CE, that is every ca. 400 years on average. Destructive earthquakes leading to serious loss of life strike about every 80 years. While stringent construction regulations are currently in place and recently built structures are earthquake-safe, as of 2007[update] the majority of the buildings in Israel were older than these regulations and many public buildings as well as 50,000 residential buildings did not meet the new standards and were "expected to collapse" if exposed to a strong quake. Given the fragile political situation of the Middle East region and the presence there of major holy sites, a quake reaching magnitude 7 on the Richter scale could have dire consequences for world peace.

Answer:
When did the most catastrophic earthquakes occur?