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]: noel cobb (21 march 1938 – 2 january 2015) was an american-born british philosopher, psychologist, and author.
[A]: noel cobb


[Q]: abadeh is a city in southwestern iran.
[A]:
abadeh