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].

Example input: At least Raheem Morris finally has the name of the Bucs' starting quarterback in the back of his mind.
 He wants to make sure he made the decision with his head and not just his heart.
 That's why Morris declined to name his choice between Byron Leftwich and Luke McCown on Friday until after one last consultation with his coaching staff.
 After that  Morris said  he would inform the owners  then his team before making the eagerly awaited announcement. Players were off Friday  so an announcement could come this morning.
 "We'll have a decision here in the near future " Morris said. "I think we've got to go with who we think gives us the best chance to win.
Example output: Raheem Morris
Example explanation: Here the main entity is Raheem  Morris since the main topic of the document is about him starting as quarterback.
Q: (CNN) The President has excoriated football players who have joined a protest movement by former 49ers quarterback Colin Kaepernick as unpatriotic. But the President is overlooking history -- which shows athletes now lauded as heroes  like  Jackie Robinson and Muhammad Ali   raising  their  voices (or taking a seat) in protests similar to Kaepernick's.
 Jackie Robinson   rightfully celebrated for showing enormous grace under pressure while breaking baseball's color line  refused to stand for the National Anthem after  his  playing days.
Jackie Robinson as a Brooklyn Dodger.
As  he  described in  his  1972 autobiography   Robinson -- like contemporary NFL players --  was protesting against institutional racism.  He  was expressing  his  feelings of alienation from America's system of racial apartheid.
 Robinson 's pugnacious brand of civil rights activism set the stage for succeeding generations of black athletes. Eleven-time NBA champion Bill Russell emerged as one of the most outspoken civil rights advocates of the 1960s  at a time when the city he played in  Boston  represented one of the most racially segregated cities in the North.
Above all  black American athletes are citizens  fathers  brothers  husbands and sons who have a right and responsibility to continue a long struggle for dignity exemplified by Jackie Robinson  Bill Russell and many others.
A:
Jackie Robinson