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: inverness airport is an international airport at dalcross, 7 nautical miles (~8 miles or 13 km) north east of the city of inverness in the scottish highlands.

Output: inverness airport

Input: Consider Input: the viol (rhymes with "mile") is a string instrument that is played with a bow.

Output: viol

Input: Consider Input: the global hunger index is a measurement to measure the hunger situation in a country.
Output: global hunger index