Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Problem:Lagos, Nigeria (CNN) Facebook founder Mark Zuckerberg's visit to Nigeria, his first to sub-Saharan Africa, has put the country's tech businesses firmly in the world's spotlight. Zuckerberg staged a surprise visit to the country's economic capital Lagos on Tuesday and his first stop was a local innovation center and tech hub in Yaba, an area on the mainland of Lagos known as Nigeria's Silicon Valley. There was no fanfare amid tight security and some of those working at the Co-Creation Hub, called CcHUB, didn't even know Zuckberg was coming. He appeared nervous, a little startled even, as he launched into an impromptu speech about why he was there.Zuckerberg causes a stir with surprise visit to Nigeria on TuesdayEntrepreneurs say it will give country's startup industry a boost 
 Question:I'll be meeting with developers and entrepreneurs, and learning about the startup ecosystem in _.
Solution:
Nigeria