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.

kappa (uppercase/lowercase Κ κ), is the letter of the greek alphabet, used to represent the "k" sound in ancient and modern greek.
kappa

various positions is the seventh studio album by leonard cohen, it was released in december 1984 (and february 1985).
various positions

the church of england is the leading christian church in england.

church of england