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: (CNN) She's been called a "Russian government attorney," a "trusted insider" of the Kremlin, the "go-to lawyer for the Moscow regional government" and an acquaintance of Russia's powerful prosecutor general. Natalia Veselnitskaya, 42, rose from obscurity to international notoriety following the disclosure of her June 9, 2016, meeting with Donald Trump, Jr., Jared Kushner and Paul Manafort. She also appears to have amassed considerable wealth in a very short period of time, 14 years ago, when her legal career in the Moscow region (not to be confused with the city of Moscow) was in its infancy and she was just transitioning from being a government employee to a private practitioner.Russian lawyer Natalia Veselnitskaya was a key participant at the June 2016 Trump Tower meeting with Donald Trump Jr. and campaign aidesMichael Weiss: How a young provincial attorney with a modest income was able to afford seven figures worth of property is a very Russian mystery -- as is her journey to the Trump Tower meeting 
 Question:Browder's lawyer, Vladimir Pastoukhov, added that after _ took on the Katsyv's legal defense in the Prevezon case, "the prosecutor's office and Yuri Chaika personally started to play an unbelievably active role in the Magnitsky story."

Natalia Veselnitskaya