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.

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

dominique dropsy (9 december 1951 7 october 2015) was a french footballer.
dominique dropsy

columbus crew sc (known before 2015 as simply "columbus crew") are an american soccer team that plays in major league soccer in columbus, ohio.
columbus crew sc