Definition: Given a document, find the main entity about whom the author is writing. Write the full name if mentioned in the text. Note that URLs in the text have been replaced with [Link].
Input: Anders Fogh Rasmussen  the former NATO chief and adviser to Ukraine's leader  said  Russian President Vladimir Putin  "must be laughing right now" at how successfully  he 's undermined Western democracy.  He  said the lack of answers from the Trump administration would be seen as a sign of weakness that  Putin  would exploit.
" He 's achieved much more than  he  could have ever dreamed of when it comes to undermining the credibility of Western democratic institutions "  Rasmussen  said Thursday in an Associated Press interview. "When  he 's watching the ongoing discussion here in Washington  I think it's unbelievable for  him  that  he  could achieve that much for a very modest investment in whatever  he  might have invested in interference in the election or whatever."
The former prime minister of Denmark   Rasmussen  joined a growing chorus of Russia critics expressing exasperation that an Oct. 1 deadline came and went without new penalties to punish Russia for interfering in the U.S. election. A law Trump signed in August requires the administration to produce a list of individuals linked to Russia's defense and intelligence agencies. Anyone who does business with those individuals could then be hit themselves with U.S. sanctions.
"So far  nothing has happened from the administration side " Rasmussen said. Still  he said that just the threat of U.S. weapons potentially flowing to the Ukrainians had affected  Putin 's deliberations about Ukraine in a positive way. He said he believed  Putin 's recent proposal to send U.N. peacekeepers to eastern Ukraine reflected the Russian leader's "attempt to find a way out of all of this."
Output:
Vladimir Putin