In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Q: The Sahel (/ səˈhɛl /) is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara to the north and the Sudanian Savanna to the south. Having a semi-arid climate, it stretches across the south-central latitudes of Northern Africa between the Atlantic Ocean and the Red Sea. The name is derived from the Arabic word sāḥil (ساحل, Arabic pronunciation: (ˈsaːħil)) meaning 'coast' or 'shore' in a figurative sense (in reference to the southern edge of the vast Sahara), while the name Swahili means 'coastal (dweller)' in a literal sense.

A: what is the difference between sahel and sahara
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Q: The Chesapeake Bay Bridge -- Tunnel (CBBT) is a 23-mile (37 km) fixed link crossing at the mouth of the Chesapeake Bay in the U.S. state of Virginia. It connects Northampton County on the Delmarva Peninsula with Virginia Beach, which is part of the Hampton Roads metropolitan area. The bridge -- tunnel originally combined 12 miles (19 km) of trestle, two 1-mile-long (1.6 km) tunnels, four artificial islands, four high-level bridges, approximately 2 miles (3.2 km) of causeway, and 5.5 miles (8.9 km) of approach roads -- crossing the Chesapeake Bay and preserving traffic on the Thimble Shoals and Chesapeake shipping channels. It replaced vehicle ferry services that operated from South Hampton Roads and from the Virginia Peninsula from the 1930s. Financed by toll revenue bonds, the bridge -- tunnel was opened on April 15, 1964, and remains one of only ten bridge -- tunnel systems in the world, three of which are located in Hampton Roads, Virginia.

A: when was the chesapeake bay bridge tunnel completed
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Q: Twice named European Footballer of the Year, Beckenbauer appeared 103 times for West Germany and played in three FIFA World Cups. He is one of three men, along with Brazil's Mário Zagallo and France's Didier Deschamps to have won the World Cup as a player and as a manager; he lifted the World Cup trophy as captain in 1974, and repeated the feat as a manager in 1990. He was the first captain to lift the World Cup and European Championship at international level and the European Cup at club level. He was named in the World Team of the 20th Century in 1998, the FIFA World Cup Dream Team in 2002, and in 2004 was listed in the FIFA 100 of the world's greatest living players.

A:
. only player in history who won world cup as captain and coach for his nation
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