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.

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.
language death

leni robredo (born april 23, 1965) is a filipina lawyer and politician.
leni robredo

worldcat is an online catalog stystem which lists the combined collections of 70,000+ libraries in 170 countries.

worldcat