context: Cocaine is considered the most natural stimulant. It is extracted from the leaves of the plant coca, which grows in South America, where people chew it and they have been known for 5000 years, especially Bolivia and Peru, or they put it with tea and drink it to refresh and overcome fatigue. Pure cocaine was isolated from the plant in 1880 by Alfred Niemann and was used as a local anesthetic in eye, nose and throat surgeries because this substance constricts blood vessels and prevents bleeding. Doctors used it at the beginning of the last century as a treatment for depression Sigmund Freud.
question: From the leaves of any plant extract cocaine?
answers.text: coca