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.

Example Input: nick clegg was a member of the european parliament (mep) from 1999 to 2004 and was first elected as a liberal democrat mp in the 2005 general election.
Example Output: nick clegg

Example Input: cartagena (pronounced /kartaˈçena/ in spanish; the usual english pronunciation is /ˌkaːtəˈheɪnə/ or /ˌkaɹɾəˈheɪnə/), also known as cartagena de indias ("cartagena of the west indies"), is a large city seaport on the northern coast of colombia.
Example Output: cartagena de indias

Example Input: great hallingbury is a village and civil parish in uttlesford, essex, england.
Example Output:
great hallingbury