Given the task definition and input, reply with output. In this task, you are given a context paragraph of the tweet and question. Your task is to generate right answer of given question based on given context tweet paragraph.

Context: Terrrrrific #NumberOfTheDay: Tigers now living wild globally - the first rise in 100 years Lang Banks, WWF (@LangBanks) April 11, 2016 Question: how long has it been since the last increase in tigers?
100 years