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: the river clyde (, ]) is a river in scotland.

Output: river clyde


Input: Consider Input: click beetle is the common name for beetles in the family elateridae.

Output: click beetle


Input: Consider Input: the capital of bihor county is oradea.


Output: bihor county