Definition: 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].
Input: A Texas hunter who is paying $350,000 (£235,000) to shoot a Black Rhino in Africa has been granted permission to import the animal's carcass to the U.S. as a trophy. Corey Knowlton sparked fury among animal rights activists after bidding for the right to shoot the animal at an auction held by the Dallas Safari Club last year. After news of the auction broke Mr Knowlton received death threats and has had to hire a private security team. Trophy: Texas big game hunter Corey Knowlton has been granted permission to bring the carcass of a Black Rhino back to the U.S.Corey Knowlton won right to kill the animal at an auction last yearBut he was waiting for permission to bring the carcass back to the U.S.150,000 people signed petition demanding his request should be deniedNamibia sells small number of Rhino-hunting licences every yearMoney is used to fund anti-poaching efforts under controversial scheme 
 Question:Prior to _'s poaching boom in the 1960s, the country had around 70,000 black rhinos.

Namibia