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: nickel creek was an american acoustic musical group.
Example Output: nickel creek

Example Input: a group of his hostages nicknamed him "jihadi john" since he was part of a four-person terrorist cell with british accents whom they called "the beatles".
Example Output: jihadi john

Example Input: st augustine's abbey was a benedictine abbey in canterbury, kent, england.
Example Output:
st augustine's abbey