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: laurie cunningham is a former football player.

SOLUTION: laurie cunningham

PROBLEM: police action is a term for the use of military forces without declaring war.

SOLUTION: police action

PROBLEM: in norse mythology, fenrir (old norse: “he who dwells in the marshes”), also known as fenrisúlfr (old norse: “fenrir's wolf”), or "vanargand"' ("monster of the river van"), is a giant, monstrous wolf, son of loki and the giantess angrboða, and the brother of hel and jörmungandr.

SOLUTION:
fenrir