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.

Input: Consider Input: rsgc1 is a massive young open star cluster in the milky way galaxy.

Output: rsgc1


Input: Consider Input: one of the books that cornelia meigs wrote won the newbery medal in 1934.

Output: cornelia meigs


Input: Consider Input: the sea peoples are supposed to be a seafaring confederation that attacked ancient egypt and other parts of the east mediterranean.


Output: sea peoples