Determine the topic of the question-answer pair. Question: "when did classification of races begin?"; Answer: "First used to denote national affiliations, the term began to be used to relate to physical traits in the 17th century."? Topic:
Ans: Race (human classification)

Determine the topic of the question-answer pair. Question: "WHO IS HENRY SAMPSON JR.?"; Answer: "Henry T. Thomas Sampson, Jr. (born in Jackson, Mississippi in 1934) is an African-American inventor."? Topic:
Ans: Henry Sampson (inventor)

Determine the topic of the question-answer pair. Question: "who wrote the song cocaine?"; Answer: ""Cocaine" is a song written and recorded by JJ Cale in 1976, but also known as a cover version recorded by Eric Clapton ."? Topic:
Ans: Cocaine (song)

Determine the topic of the question-answer pair. Question: "what is the organic layer in an amoled screen?"; Answer: "This layer of organic semiconductor is situated between two electrodes."? Topic:
Ans: OLED