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.

[EX Q]: the castle of almansa is a castle in almansa, spain.
[EX A]: castle of almansa

[EX Q]: "the raven" is a narrative poem by american writer edgar allan poe, first published in january 1845.
[EX A]: the raven

[EX Q]: the tornado outbreak sequence of june 1966 was a series of tornado outbreaks which happened between june 2 and june 12.
[EX A]:
tornado outbreak sequence of june 1966