Question: When was the independent music and dramatic arts school  founded from which Howard Milner got post graduate degree?

Context paragraphs:
Sulkhan Singh: Sulkhan has a graduate degree in Civil Engineering (BTech/B. E.) from IIT Roorkee (then University of Roorkee), a post graduate degree in Structural Engineering from IIT Delhi.  He also has a degree in Law (LLB).

Hazra Law College: Hazra Law College is the Department of Law of the Calcutta University situated at Ballygunge, Hazra road campus in Kolkata.  It offers graduate, post graduate degree and PhD.  degree in Law.  The Department also provides Post-Doctoral degree under the University of Calcutta.

Technological University, Monywa: The Technical University, Monywa (Burmese: နည်းပညာတက္ကသိုလ် (မုံရွာ ) is located on a 48.209 acre campus in Minywa, Sagaing Division, Myanmar.  It was established in 1982 as Technological High School.  In 1986 it became Government Technological Institute.  In 1999 it was promoted to Government Technological College.  In 2007 the school was promoted to university level.  Technological University (Monywa) offers Graduate Degree and Post Graduate Degree Programs.

Technological University, Dawei: Technological University, Dawei situated at Dawei District, Taninthayi Region, Myanmar with the area of 90.8 arcas.  It was formerly opened as Government Technical College (GTC) on 2 December 1999 and has been promoted to University level on 20 January 2007.  Technological University (Dawei) offers the following engineering degree programs:Post Graduate Degree,Graduate Degree,Under Graduate Degree.  Technological University (Dawei) provides laboratory equipment for every majors and also provides language lab room to improve English communication skill.

Great Lakes Institute of Management, Gurgaon: The Great Lakes Institute of Management, Gurgaon (GLIM), (formerly Great Lakes Institute of Energy Management and Research) is a private business school in India.  It began its operations in 2010 and is an extended arm of the Great Lakes Institute of Management, Chennai, founded by Dr. Bala V. Balachandran.  The Institute offers various full time and executive management programs with the one-year Post Graduate Program in Management (PGPM) being its flagship course.  Great Lakes also offers a two-year full-time AICTE approved Post Graduate Diploma in Management (PGDM) (formerly, Post Graduate Program in Management - Energy).

Howard Milner: Howard Milner (23 February 1953 – 6 March 2011) was a British tenor.  He began his musical education as a chorister at Coventry Cathedral.  He then won a music scholarship to Monkton Combe School, read English at Cambridge University followed by post graduate at the Guildhall School of Music and Drama.

USC School of Dramatic Arts: The USC School of Dramatic Arts (SDA) (formerly the USC School of Theatre) is the dramatic arts school at the University of Southern California.  It is ranked one of the top 10 dramatic arts schools in the world, according to The Hollywood Reporter's Top 25 Drama Schools.  The USC School of Dramatic Arts offers Bachelor of Arts degrees in theatre and visual & performing arts; Bachelor of Fine Arts degrees in acting, design, sound design, stage management and technical direction; and Master of Fine Arts degrees in acting and dramatic writing.

SSLNT Women's College: SSLNT Women's College offers Intermediate and Bachelor Degree course in the field of Arts, Science, Commerce, Post Graduate Degree Course in Home Science and B.Ed.  The Intermediate courses run under Jharkhand Academic Council, Jharkhand.  The Degree courses, Post Graduate Course in Home Science and B.Ed.  run under Vinoba Bhave University, Hazaribag.

Guildhall School of Music and Drama: The Guildhall School of Music and Drama is an independent music and dramatic arts school which was founded in 1880 in London, England.  Students can pursue courses in music, opera, drama and technical theatre arts.

Villa Marie Degree College: Villa Marie Intermediate, Degree and Post Graduate College (Established in 1991 in Hyderabad, India) is an educational institution which was started by Dr. Y. Philomena Principal and Director based in Hyderabad, India.  The institution was started as a modest Intermediate Junior College in its present confines at Somajiguda.  Since then it has successfully expanded into a Degree College in 1996 with an affiliation to Osmania University offering Bachelors in Arts, Commerce and Science and later as a Post Graduate Institution offering Masters in Business Administration and Masters in Computer Applications.

Supporting paragraphs: Howard Milner Guildhall School of Music and Drama
Answer: 1880