TASK DEFINITION: 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.
PROBLEM: the scrotum is the bag that holds the testicles (commonly called "balls") in male mammals.

SOLUTION: scrotum

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

SOLUTION: spintronics

PROBLEM: paz vega (also paz campos trigo; born january 2, 1976) is a spanish actress.

SOLUTION:
paz vega