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]: in greek mythology, the nereids ( "nereides") are sea nymphs, the fifty daughters of nereus, the old man of the sea, and the okeanid doris.
[A]: nereid


[Q]: the karlal (urdu کرڑال also known as kard'al, karaal, karhral, or kiraal) is a hindko speaking tribe in khyber-pakhtunkhwa, pakistan.
[A]: karlal


[Q]: bath rugby are a rugby club based in bath, england who play in the aviva premiership.
[A]:
bath rugby