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: sandy gandhi (born sandra aranha; 28 january 1958 – 1 february 2017) was an australian comedian and columnist.

SOLUTION: sandy gandhi

PROBLEM: chumbawamba were a british alternative rock group.

SOLUTION: chumbawamba

PROBLEM: the great hammerhead shark ("sphyrna mokarran"), is the largest species of the hammerhead shark group.

SOLUTION:
great hammerhead shark