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.

Q: joe the plumber, nickname of "samuel joseph "joe" wurzelbacher", (born december 3, 1973 in toledo, ohio) is an american commentator, motivational speaker and political activist.

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

A: kappa
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Q: mylo xyloto is the fifth studio album by coldplay.

A:
mylo xyloto
****