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: language death is when a language stops being used as a first language (also called mother language or native language) and as a second language, which it then becomes an extinct language.

A: language death
****
Q: the nemean lion ( ""; latin: "leo nemaeus") was a vicious monster in greek mythology that lived at nemea.

A: nemean lion
****
Q: a trill consonant is a consonant that is made by vibrating an articulator, or hitting it many times against something else.

A:
trill consonant
****