Question:
Garry Kimovich Kasparov (Russian: Garri Kimovich Kasparov, Russian pronunciation: ['garjI 'kjim@vjItc ka'spar@f]; born Garik Kimovich Weinstein, 13 April 1963) is a Russian, and formerly Soviet, chess grandmaster, former world chess champion, writer, and political activist, who many consider to be the greatest chess player of all time. From 1986 until his retirement in 2005, Kasparov was ranked world No. 1 for 225 out of 228 months. His peak rating of 2851, achieved in 1999, was the highest recorded until being surpassed by Magnus Carlsen in 2013. Kasparov also holds records for consecutive professional tournament victories (15) and Chess Oscars (11).
The Kasparov-Kramnik match took place in London during the latter half of 2000. Kramnik had been a student of Kasparov's at the famous Botvinnik/Kasparov chess school in Russia, and had served on Kasparov's team for the 1995 match against Viswanathan Anand.  The better-prepared Kramnik won game 2 against Kasparov's Grunfeld Defence and achieved winning positions in Games 4 and 6, although Kasparov held the draw in both games. Kasparov made a critical error in Game 10 with the Nimzo-Indian Defence, which Kramnik exploited to win in 25 moves. As White, Kasparov could not crack the passive but solid Berlin Defence in the Ruy Lopez, and Kramnik successfully drew all his games as Black. Kramnik won the match 8 1/2 -6 1/2 . Kasparov became the first player to lose a world championship match without winning a game since Emanuel Lasker lost to Jose Raul Capablanca in 1921.  After losing the title, Kasparov won a series of major tournaments, and remained the top rated player in the world, ahead of both Kramnik and the FIDE World Champions. In 2001 he refused an invitation to the 2002 Dortmund Candidates Tournament for the Classical title, claiming his results had earned him a rematch with Kramnik.  Kasparov and Karpov played a four-game match with rapid time controls over two days in December 2002 in New York City. Karpov surprised the experts and emerged victoriously, winning two games and drawing one.  Due to Kasparov's continuing strong results, and status as world No. 1 in much of the public eye, he was included in the so-called "Prague Agreement", masterminded by Yasser Seirawan and intended to reunite the two World Championships. Kasparov was to play a match against the FIDE World Champion Ruslan Ponomariov in September 2003. But this match was called off after Ponomariov refused to sign his contract for it without reservation. In its place, there were plans for a match against Rustam Kasimdzhanov, winner of the FIDE World Chess Championship 2004, to be held in January 2005 in the United Arab Emirates. These also fell through due to lack of funding. Plans to hold the match in Turkey instead came too late. Kasparov announced in January 2005 that he was tired of waiting for FIDE to organize a match and so had decided to stop all efforts to regain the World Championship title.
Answer this question using a quote from the text above:

Why did he refuse the invitation?

Answer:
claiming his results had earned him a rematch with Kramnik.

Answer the question at the end by quoting:

John F. Maulbetsch (June 20, 1890 - September 14, 1950) was an All-American football halfback at Adrian College in 1911 and for the University of Michigan Wolverines from 1914 to 1916. He is also a member of the College Football Hall of Fame. After playing with an independent football team in Ann Arbor and at Adrian College, Maulbetsch became one of the most famous American football players in 1914 while playing for the University of Michigan. Maulbetsch became known as the "Human Bullet" because of his unusual low, line-plunging style of play, and was also known as the "Featherweight Fullback" because of his light weight and small size.
Maulbetsch's breakthrough came on October 31, 1914, in front of 30,000 fans at Harvard. The game was one of the most anticipated matches of the year. A special train brought Michigan fans to Cambridge, Massachusetts, and hundreds of Michigan alumni from the East were on hand as "reinforcements." Though Harvard prevailed, 7-0, Maulbetsch was the big story in papers across the country. Writers from Ring Lardner to Damon Runyon told the story of Maulbetsch's performance. Lardner said: "If anyone tells you the East plays the best brand of football, Maulbetsch shot that theory full of holes." According to Runyon, the Wolverines used "the mighty Maulbetsch as their battering ram", and he "gained enough ground against Harvard to bury a German army corps." Football writer Frank G. Menke said: "No westerner ever created half the stir in the east as did this Michigander . . . His peculiar, baffling style of attack, backed by phenomenal strength almost always earned for him gains of 5 to 20 yards every time he was called upon to carry the ball." Another writer noted Maulbetsch's skill as a "line breaker" as he "carried the ball repeatedly through the Harvard line and into the secondary defense with bullet-like rushes that upset tackler after tackler." Maulbetsch was responsible for four-fifths of Michigan's ground gains, and on several occasions his dives reportedly "had so much power that he dove right through a double line of crimson players and went sprawling on the ground twelve to twenty feet clear of the double line."  While every report indicates that Maulbetsch had a big day, the accounts vary dramatically as to exactly how many yards he gained. Frank Menke reported after the game that Maulbetsch gained 300 yards. A 1938 newspaper account said he "gained 350 yards from scrimmage." Yet, his 1951 obituary indicated he gained 133 yards in 30 attempts.  Despite Maulbetsch's efforts, Michigan was never able to punch the ball across the goal line. Many blamed Michigan's quarterback who switched to another back every time after Maulbetsch "took the ball to the shadow of the Crimson goal posts." In answer to the question why Michigan was unable to score, Frank Menke said: "Ask the fellow who quarterbacked for Michigan that day. His actions were too mystifying for the spectators to figure out."  When Harvard reneged on an agreement to play a game in Ann Arbor in 1915, sports writers concluded it was to avoid facing Maulbetsch again. Said one reporter: "When faih Hahvahd [sic] saw what Maulbetsch did in the first clash, it decided it cared to see no more of him. He was too rough."

Were there other famous people involved in the game?