instruction:
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.
question:
lee soo-young (born lee ji-yeon april 12, 1979) is a korean ballad singer.
answer:
lee soo-young


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


question:
aaron sherritt (1855 - 26 june 1880) was a close friend of joe byrne and later ned kelly.
answer:

aaron sherritt