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: a superscalar cpu design makes a form of parallel computing called instruction-level parallelism inside a single cpu, which allows more work to be done at the same clock rate.

Output: superscalar


Input: Consider Input: "hail to the chief" is the official presidential anthem of the united states.

Output: hail to the chief


Input: Consider Input: the russian ground forces (russian: Сухопутные войска Российской Федерации) are the land forces of the armed forces of the russian federation, formed after the break up of the soviet union.


Output: russian ground forces