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: sonic firestorm is the second studio album by english power metal band dragonforce released through on may 11, 2004.

Output: sonic firestorm


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 tibetan language is a language spoken in tibet, a region of china.


Output: tibetan language