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: The written contents of an envelope containg a white powder received Monday by  Donald Trump Jr. âs wife said the president's son would get what he "deserves " the NYPD confirmed to Fox News on Tuesday.
 President Trumpâs  daughter-in-law  Vanessa  opened the letter addressed to her husband around 10 a.m. She was subsequently taken to the hospital as a precaution  along with two others  police said.
DONALD TRUMP JR.âS  WIFE  TAKEN TO HOSPITAL AFTER OPENING ENVELOPE WITH WHITE POWDER
 Trump Jr.  tweeted Monday about the âscary situation â saying it was âTruly disgusting that certain individuals choose to express their opposing views with such disturbing behavior.â
 Trump Jr.  is the eldest son of the president.  He  married Vanessa in 2005. The couple has five children  but it was unclear if any were home at the time of the incident.
Output:
Donald Trump Jr.