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.

platinum is a soft, heavy, white metal.
platinum

monosemy is when the words in a language each have only one meaning.
monosemy

linda taylor (born martha louise white; c. january 1926 – april 18, 2002) was an american criminal.

linda taylor