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.

[EX Q]: 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.
[EX A]: inverness airport

[EX Q]: the jungle book is a collection of stories written by rudyard kipling.
[EX A]: the jungle book

[EX Q]: sellapan ramanathan (tamil: செல்லப்பன் ராமநாதன்; (july 3, 1924 – august 22, 2016) was the sixth president of the republic of singapore.
[EX A]:
sellapan ramanathan