Question: Some have compared Aimee Walker Pond to another disabled person, whose teacher was who?

Context paragraphs:
Nawang Sherpa: Nawang Sherpa became the first person to climb Mount Everest with a prosthetic leg by reaching the summit on May 16, 2004 (see Mount Everest Timeline and Trivia).  He is also the first amputee to reach the summit of Mount Everest on his first attempt, and the first disabled person from Asia to stand on the summit.

Aimee Walker Pond: Aimee Patricia Walker Pond (born March 10, 1983) is a United States gymnast.  A graduate of Brigham Young University, Pond has been involved in gymnastics since the age of eight.  She is completely deaf and is blind in her right eye, making her one of a very few disabled gymnasts who have competed at the national level (another is Marie Roethlisberger).  Some have compared her to Helen Keller to which Pond has responded "She's so wonderful, but I am glad I'm not Helen Keller, I'm so lucky- I have my one eye."

Intelligent disobedience: Intelligent disobedience occurs where a service animal trained to help a disabled person goes directly against the owner's instructions in an effort to make a better decision.  This behavior is a part of the dog's training and is central to a service animal's success on the job.  The concept of intelligent disobedience has been in use and a common part of service animals' training since at least 1936.

Mobility car: Mobility Car Is a vehicle issued to a disabled person, to allow them to travel without burden of their disability.  Mobility cars are obtained from a scheme called "Motability".

Melanie Reid: Melanie Reid MBE (born 1957) is an award-winning "Times" journalist whose weekly column for "The Times", 'Spinal Column', is about disability and her life as a disabled person.  She broke her neck and back in April 2010 whilst horse riding, and is now a tetraplegic.  Following her accident she spent twelve months in the spinal unit of Southern General Hospital in Glasgow.

Rosemary Crossley: Rosemary Crossley AM (born 1945) is an Australian author and advocate for disability rights and facilitated communication, a discredited technique in which a disabled person with difficulty communicating is encouraged to spell out messages with a keyboard or letter board, while their hand is held and helped to move by a facilitator.

Circle of Friends (disabled care): The Circle of Friends approach is a method designed to increase the socialization and inclusion of a disabled person with their peers.  A Circle of Friends consists of a "focus" child, for whom the group was established, six to eight classroom peers, and an adult facilitator who meet once weekly to socialize and work on specific goals.  Most available resources about the Circle of Friends approach are geared toward its use with school-aged children with various difficulties.

Henson trust: A Henson trust (sometimes called an absolute discretionary trust), in Canadian law, is a type of trust designed to benefit disabled persons.  Specifically, it protects the assets (typically an inheritance) of the disabled person, as well as the right to collect government benefits and entitlements.

Chevella Ravi: Chevella Ravi (born 7 July 1989) known for his TV pseudonym, Bithiri Sathi, is an Indian TV anchor, reporter and actor.  "Bithiri Sathi", an intellectually disabled person, is part of the daily news, Teenmaar News,on Telugu news channel V6 News.  His news program is a parody on current affairs, politicians and entertainment industry which runs for 8-10 minutes, is a huge hit for the channel.  He became a YouTube sensation with millions of hits for his programs.

Helen Keller: Helen Adams Keller (June 27, 1880 – June 1, 1968) was an American author, political activist, and lecturer.  She was the first deaf-blind person to earn a bachelor of arts degree.  The story of how Keller's teacher, Anne Sullivan, broke through the isolation imposed by a near complete lack of language, allowing the girl to blossom as she learned to communicate, has become widely known through the dramatic depictions of the play and film "The Miracle Worker".  Her birthplace in West Tuscumbia, Alabama, is now a museum and sponsors an annual "Helen Keller Day".  Her birthday on June 27 is commemorated as Helen Keller Day in the U.S. state of Pennsylvania and was authorized at the federal level by presidential proclamation by President Jimmy Carter in 1980, the 100th anniversary of her birth.

Supporting paragraphs: Aimee Walker Pond Helen Keller
Answer: Anne Sullivan