instruction:
Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
question:
Context: Princess Hildegard of Bavaria (German: Hildegard Luise Charlotte Theresia Friederike von Bayern; 10 June 1825 -- 2 April 1864) was the seventh child and fourth daughter of Ludwig I of Bavaria and Therese of Saxe-Hildburghausen. 
 Question: Who was the mother of Princess Hildegard of Bavaria?
answer:
therese of saxe-hildburghausen


question:
Context: Alejandro Adem is a professor in the Department of Mathematics at the University of British Columbia since 2005 and the holder of a Canada Research Chair at UBC. 
 Question: What is Alejandro Adem's place of employment?
answer:
university of british columbia


question:
Context: Our planet was born some billions of years ago. Ever since this planet has developed, it has surprised us human beings. No matter how much we human beings have developed technologically, we cannot ever create this kind of natural planet. The human race can only discover some amazing facts about it. Let us find out what some of them are. On September 13, 1922 El Azizia, a place in Libya, recorded a temperature of 136 degrees Fahrenheit. This was the highest temperature ever measured on the planet Earth. The highest waterfall in the world is Angel Falls in Venezuela, which drops from an amazing height of 3,212 feet. The waterfall drops over the edge of Auyantepui in the Canaima National Park. The gravitational pull of the Earth can be escaped if someone moves at a speed of 6.95 miles per second. At such a speed, one could travel from New York to Philadelphia in just 20 seconds. If the entire water in the world's oceans evaporated, the salt we got from these oceans could cover the entire planet with a 500-foot deep layer of salt. The deepest lake on Earth is Lake Baikal in Russia. Lake Baikal is the largest freshwater lake in the world, containing about 20% of the world's unfrozen surface fresh water. The Andes in South America spreads over 4,525 miles. This is the longest mountain range in the world. Did you know that the biggest valley in the world is the Grand Valley in Mesa County, Colorado and Grand County, Utah? It is about 30 miles (48 km) long and 5 miles (8 km) wide, along the Colorado River. The amazing facts about the earth are too many to be told completely above. 
 Question: Where is the longest mountain range in the world?
answer:

in south america.