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.

[EX Q]: nickel creek was an american acoustic musical group.
[EX A]: nickel creek

[EX Q]: in 2013, esther peterson was inducted into the us department of labor's hall of honor.
[EX A]: esther peterson

[EX Q]: ashleigh mcivor (born september 15, 1983 in vancouver, british columbia) is a canadian retired freestyle skier.
[EX A]:
ashleigh mcivor