Task: Question Answering
Input (English): Passage: In September 1921, Beiderbecke enrolled at the Lake Forest Academy, a boarding school north of Chicago in Lake Forest, Illinois. While historians have traditionally suggested that his parents sent him to Lake Forest to discourage his interest in jazz, others believe that he may have been sent away in response to his arrest. Regardless, Mr. and Mrs. Beiderbecke apparently felt that a boarding school would provide their son with both the faculty attention and discipline required to improve his academic performance, necessitated by the fact that Bix had failed most courses at High School, remaining a junior in 1921 despite turning 18 in March of that year. His interests, however, remained limited to music and sports. In pursuit of the former, Beiderbecke often visited Chicago to listen to jazz bands at night clubs and speakeasies, including the infamous Friar's Inn, where he sometimes sat in with the New Orleans Rhythm Kings. He also traveled to the predominantly African-American South Side to listen to classic black jazz bands such as King Oliver's Creole Jazz Band, which featured Louis Armstrong on second cornet. "Don't think I'm getting hard, Burnie," he wrote to his brother, "but I'd go to hell to hear a good band." On campus, he helped organize the Cy-Bix Orchestra with drummer Walter "Cy" Welge and almost immediately got into trouble with the Lake Forest headmaster for performing indecorously at a school dance.
Beiderbecke often failed to return to his dormitory before curfew, and sometimes stayed off-campus the next day. In the early morning hours of May 20, 1922, he was caught on the fire escape to his dormitory, attempting to climb back into his room. The faculty voted to expel him the next day, due both to his academic failings and his extracurricular activities, which included drinking. The headmaster informed Beiderbecke's parents by letter that following his expulsion school officials confirmed that Beiderbecke "was drinking himself and was responsible, in part at least, in having liquor brought into the School." Soon after, Beiderbecke began pursuing a career in music.He returned to Davenport briefly in the summer of 1922, then moved to Chicago to join the Cascades Band, working that summer on Lake Michigan excursion boats. He gigged around Chicago until the fall of 1923, at times returning to Davenport to work for his father. 
Question: What is the last name of the person whose interests remained limited to music and sports?
Output (English): Beiderbecke.