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: lyme regis is a coastal town in west dorset, england, 25 miles west of dorchester and 25 mi east of exeter.

Output: lyme regis


Input: Consider Input: plumbaginaceae is a family of flowering plants are about 560 species in 10 genera found all over the world.

Output: plumbaginaceae


Input: Consider Input: the placoderms ("placodermi": greek = "plated skin") were a class of armoured prehistoric fish, which lived from the mid silurian to the end of the devonian period.


Output: placoderm