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.

2ne1 is a pop group of female singers from south korea.
2ne1

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

the fibula is one of the two bones which make up the lower leg (humans), or back leg in tetrapods.

fibula