Article: Hydrogen forms a vast array of compounds with carbon called the hydrocarbons, and an even vaster array with heteroatoms that, because of their general association with living things, are called organic compounds. The study of their properties is known as organic chemistry and their study in the context of living organisms is known as biochemistry. By some definitions, "organic" compounds are only required to contain carbon. However, most of them also contain hydrogen, and because it is the carbon-hydrogen bond which gives this class of compounds most of its particular chemical characteristics, carbon-hydrogen bonds are required in some definitions of the word "organic" in chemistry. Millions of hydrocarbons are known, and they are usually formed by complicated synthetic pathways, which seldom involve elementary hydrogen.

Question: What is the study of living organisms known as?
Ans: biochemistry


Article: In order to seek out the Karmapa, the Yongle Emperor dispatched his eunuch Hou Xian and the Buddhist monk Zhi Guang (d. 1435) to Tibet. Traveling to Lhasa either through Qinghai or via the Silk Road to Khotan, Hou Xian and Zhi Guang did not return to Nanjing until 1407.

Question: Where did Hou Xian and Zhi Guang travel through on their way to the Karmapa?
Ans: through Qinghai or via the Silk Road to Khotan


Article: Also on the north side is the suburban community of Catalina Foothills, located in the foothills of the Santa Catalina Mountains just north of the city limits. This community includes among the area's most expensive homes, sometimes multimillion-dollar estates. The Foothills area is generally defined as north of River Road, east of Oracle Road, and west of Sabino Creek. Some of the Tucson area's major resorts are located in the Catalina Foothills, including the Hacienda Del Sol, Westin La Paloma Resort, Loews Ventana Canyon Resort and Canyon Ranch Resort. La Encantada, an upscale outdoor shopping mall, is also in the Foothills.

Question: What is the southern edge of the Catalina Foothills area?
Ans: River Road


Article: Schwarzenegger's goal was to become the greatest bodybuilder in the world, which meant becoming Mr. Olympia. His first attempt was in 1969, when he lost to three-time champion Sergio Oliva. However, Schwarzenegger came back in 1970 and won the competition, making him the youngest ever Mr. Olympia at the age of 23, a record he still holds to this day.

Question: What year did Schwarzenegger first try to win the Mr. Olympia title?
Ans:
1969