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: Cleveland Cavaliers owner Dan Gilbert has revealed that he received "vile , disgusting" voicemails after star LeBron James called President Donald Trump a "bum" on Twitter . 
James ' message last weekend came in response to Trump rescinding an invitation for the NBA champion Golden State Warriors to visit the White House . 
Gilbert said he had not told James about the voicemails . 
James also commended NFL players for protesting after Trump said owners should fire any players who kneel during the national anthem . 
Gilbert and James have patched up a complicated relationship . 
Gilbert infamously wrote a letter to Cleveland fans criticizing James for leaving as a free agent in 2010 . 
The owner was later fined $ 100,000 after he accused James of quitting in the playoffs during an interview with The Associated Press . 
Earlier this week , James said he did not regret his comment about Trump . 
"Me and my friends call me that all the time ," James said during a news conference prior to the opening of Cleveland 's training camp .
Output:
LeBron James