TASK DEFINITION: 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.
PROBLEM: 2ne1 is a pop group of female singers from south korea.

SOLUTION: 2ne1

PROBLEM: thalassaemia (or thalassemia) is a genetic disorder of the blood which originated in the mediterranean region.

SOLUTION: thalassaemia

PROBLEM: the viol (rhymes with "mile") is a string instrument that is played with a bow.

SOLUTION:
viol