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.

The oldest evidence of burial customs in the Horn of Africa comes from cemeteries in Somalia dating back to 4th millennium BC. The stone implements from the Jalelo site in northern Somalia are said to be the most important link in evidence of the universality in palaeolithic times between the East and the West.
In what country is the oldest evidence of ceremonial burial in the Horn of Africa located?

Up to the 1990s, the Federal District was the most populous federal entity in Mexico, but since then its population has remained stable at around 8.7 million. The growth of the city has extended beyond the limits of the Federal District to 59 municipalities of the state of Mexico and 1 in the state of Hidalgo. With a population of approximately 19.8 million inhabitants (2008), it is one of the most populous conurbations in the world. Nonetheless, the annual rate of growth of the Metropolitan Area of Mexico City is much lower than that of other large urban agglomerations in Mexico, a phenomenon most likely attributable to the environmental policy of decentralization. The net migration rate of the Federal District from 1995 to 2000 was negative.
How many people live in the Federal District? 

The Color Orange democracy group, led by Danish sculptor Jens Galschiøt, originally planned to join the Hong Kong Alliance relay and paint the "Pillar of Shame", a structure he built in Hong Kong to commemorate the 1989 Tiananmen Square protests. However, Galschiøt and two other people were denied entry to Hong Kong on April 26, 2008 due to "immigration reasons" and were forced to leave Hong Kong. In response, Lee Cheuk Yan, vice chairman of the Hong Kong Alliance in Support of Patriotic Democratic Movements in China, said, "It's outrageous that the government is willing to sacrifice the image of Hong Kong because of the torch relay." Hollywood actress Mia Farrow was also briefly questioned at the Hong Kong airport though officials allowed her to enter. She later gave a speech criticizing China's relations with Sudan in Hong Kong, as there was also a small minority of people protesting about China's role in the crisis of Darfur. Legislator Cheung Man Kwong have also said the government's decision allowing Farrow to enter while denying others is a double standard and a violation to Hong Kong's one country, two systems policy.

Which group did Jens Galschiøt lead?