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.

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".
jihadi john

faber drive is a juno award nominated band from canada.
faber drive

chamonix is a french commune next to mont blanc.

chamonix