In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Who was chair of the IPCC in 1990?, Context: Korean economist Hoesung Lee is the chair of the IPCC since October 8, 2015, following the election of the new IPCC Bureau. Before this election, the IPCC was led by his vice-Chair Ismail El Gizouli, who was designated acting Chair after the resignation of Rajendra K. Pachauri in February 2015. The previous chairs were Rajendra K. Pachauri, elected in May 2002; Robert Watson in 1997; and Bert Bolin in 1988. The chair is assisted by an elected bureau including vice-chairs, working group co-chairs, and a secretariat.
Bert Bolin

Why are areas in Neolithic sudan no longer settled?, Context: During the Neolithic Era, before the onset of desertification, around 9500 BCE the central Sudan had been a rich environment supporting a large population ranging across what is now barren desert, like the Wadi el-Qa'ab. By the 5th millennium BCE, the people who inhabited what is now called Nubia, were full participants in the "agricultural revolution", living a settled lifestyle with domesticated plants and animals. Saharan rock art of cattle and herdsmen suggests the presence of a cattle cult like those found in Sudan and other pastoral societies in Africa today. Megaliths found at Nabta Playa are overt examples of probably the world's first known archaeoastronomy devices, predating Stonehenge by some 2,000 years. This complexity, as observed at Nabta Playa, and as expressed by different levels of authority within the society there, likely formed the basis for the structure of both the Neolithic society at Nabta and the Old Kingdom of Egypt.
now barren desert

What is the active cricket team in Hyderabad?, Context: The most popular sports played in Hyderabad are cricket and association football. At the professional level, the city has hosted national and international sports events such as the 2002 National Games of India, the 2003 Afro-Asian Games, the 2004 AP Tourism Hyderabad Open women's tennis tournament, the 2007 Military World Games, the 2009 World Badminton Championships and the 2009 IBSF World Snooker Championship. The city hosts a number of venues suitable for professional competition such as the Swarnandhra Pradesh Sports Complex for field hockey, the G. M. C. Balayogi Stadium in Gachibowli for athletics and football, and for cricket, the Lal Bahadur Shastri Stadium and Rajiv Gandhi International Cricket Stadium, home ground of the Hyderabad Cricket Association. Hyderabad has hosted many international cricket matches, including matches in the 1987 and the 1996 ICC Cricket World Cups. The Hyderabad cricket team represents the city in the Ranji Trophy—a first-class cricket tournament among India's states and cities. Hyderabad is also home to the Indian Premier League franchise Sunrisers Hyderabad. A previous franchise was the Deccan Chargers, which won the 2009 Indian Premier League held in South Africa.
Sunrisers Hyderabad