Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

[Q]: spintronics is a kind of electronics that uses the tiny magnetic fields that come from electrons as well as their electric charge.
[A]: spintronics


[Q]: one of the books that cornelia meigs wrote won the newbery medal in 1934.
[A]: cornelia meigs


[Q]: masanori tokita (鴇田 正憲, tokita masanori, june 24, 1925 - march 5, 2004) was a japanese football player.
[A]:
masanori tokita