Question: Martha Graham Center of Contemporary Dance focuses on teaching the technique that was the influence of whose techniques?
Context: Martha Graham Center of Contemporary Dance is located in New York City and is the headquarters to the Martha Graham School of Contemporary Dance and the Martha Graham Dance Company, which is the oldest continually performing dance company in the world.  The School is focused on teaching Graham's technique; some of its faculty were trained by Graham herself. Chronicle is a modern dance work choreographed by Martha Graham to music by Wallingford Riegger.  It premiered on December 20, 1936, at the Guild Theatre in New York City.  The set was designed by Isamu Noguchi.  Riegger's music was scored for piano, wind instruments and percussion; Noguchi's set was made up primarily of curtains, platforms and stairs.  The original production was danced by Martha Graham and Group, the forerunner of the Martha Graham Dance Company.  According to the program notes, the dance is based upon "the advent and consequences of war" and concerned itself with the "contemporary situation", referring to the impending conflict in Europe. The Martha Graham Dance Company, founded in 1926, is known for being the oldest American dance company.  Founded by Martha Graham as a contemporary dance company, it continued to perform pieces, revive classics, and train dancers even after Graham's death in 1991.  The company is critically acclaimed in the artistic world and has been recognized as "one of the great dance companies of the world" by the New York Times and as "one of the seven wonders of the artistic universe" by the Washington Post. Course was a modern dance work choreographed by Martha Graham to music by George Antheil.  The piece sometimes appeared on programs as "Course: One in Red; Three in Green; Two in Blue; Two in Red".  It premiered on February 10, 1935, at the Guild Theatre in New York City.  The ballet was performed by Martha Graham and Group, the forerunner to the Martha Graham Dance Company. Vision of the Apocalypse was a modern dance created by Martha Graham to music by Hermann Reutter.  It premiered on April 14, 1929, at the Booth Theatre in New York City.  The occasion marked the debut of Martha Graham and Group, Graham's new concert ensemble and the predecessor to the Martha Graham Dance Company.  "Vision of the Apocalypse" was the first piece Graham choreographed for a large group. Ron Protas is the former Associate Director of the Martha Graham Center of Contemporary Dance and heir of modern dance choreographer Martha Graham. Graham technique is a modern dance movement style and pedagogy created by American dancer and choreographer Martha Graham (1894–1991).  Graham technique has been called the "cornerstone" of American modern dance, and has been taught worldwide.  It is widely regarded as the first codified modern dance technique, and strongly influenced the later techniques of Merce Cunningham, Lester Horton, and Paul Taylor. Australian Dance Theatre (ADT) is a contemporary dance company based in Adelaide, South Australia established in 1965 by Dr. Elizabeth Cameron Dalman OAM.  Dalman sought to "open the horizons for provocative contemporary and cutting edge dance".  The ADT was the first modern dance company in Australia and drew on the techniques of Martha Graham for its inspiration.  Eleo Pomare was an early collaborator and the songs of Peter, Paul and Mary featured strongly in their early works, such as This Train. Lila York (born 29 November 1948) is an American dancer and choreographer based in New York City.  She studied English Literature at Skidmore College before studying ballet and modern dance at the Martha Graham Center of Contemporary Dance and with Paul Sanasardo.  York joined the Paul Taylor Dance Company in 1973 where she danced for more than a decade.  After leaving the company, she left the "very heart of American modern dance" to become one of "ballet's most sought-after choreographers", working with many of the world's foremost ballet companies. Horizons was a modern dance work choreographed by Martha Graham to music by Louis Horst with a set designed by Alexander Calder.  It premiered on February 23, 1936, at the Guild Theatre in New York City.  "Horizons" was divided into four parts, two ensemble dances and two solos: "Migration: New Trails" (ensemble), "Dominion: Sanctified Power" (solo), "Building Motif: Homesteading" (solo) and "Dance of Rejoycing" (ensemble).  The ballet was performed by Martha Graham and Group, the predecessor of the Martha Graham Dance Company.
Answer: Merce Cunningham, Lester Horton, and Paul Taylor