Question: Which dramatist was English, José Echegaray or J. B. Priestley?

Context paragraphs:
J. B. Priestley: John Boynton "J. B." Priestley, OM ( ; 13 September 1894 – 14 August 1984), was an English novelist, playwright, scriptwriter, social commentator and broadcaster.

The Magicians (Priestley novel): The Magicians is a short novel by J. B. Priestley, first published in 1954.  An example of Priestley's perennial concern with the true nature of time, the story uses fantasy elements to discuss the midlife crisis of a successful industrialist, briefly touching on social problems and mass psychology.

José Echegaray: José Echegaray y Eizaguirre (19 April 1832 – 4 September 1916) was a Spanish civil engineer, mathematician, statesman, and one of the leading Spanish dramatists of the last quarter of the 19th century.  He was awarded the 1904 Nobel Prize for Literature "in recognition of the numerous and brilliant compositions which, in an individual and original manner, have revived the great traditions of the Spanish drama".

An Inspector Calls: An Inspector Calls is a play written by English dramatist J. B. Priestley, first performed in 1945 in the Soviet Union and in 1946 in the UK.  It is one of Priestley's best known works for the stage, and is considered to be one of the classics of mid-20th century English theatre.  The play's success and reputation has been boosted in recent years by a successful revival by English director Stephen Daldry for the National Theatre in 1992, and a tour of the UK in 2011–2012.

Her Majesty's Theatre: Her Majesty's Theatre is a West End theatre situated on Haymarket in the City of Westminster, London.  The present building was designed by Charles J. Phipps and was constructed in 1897 for actor-manager Herbert Beerbohm Tree, who established the Royal Academy of Dramatic Art at the theatre.  In the early decades of the 20th century, Tree produced spectacular productions of Shakespeare and other classical works, and the theatre hosted premieres by major playwrights such as George Bernard Shaw, J. M. Synge, Noël Coward and J. B. Priestley.  Since the First World War, the wide stage has made the theatre suitable for large-scale musical productions, and the theatre has specialised in hosting musicals.  The theatre has been home to record-setting musical theatre runs, notably the First World War sensation "Chu Chin Chow" and the current production, Andrew Lloyd Webber's "The Phantom of the Opera", which has played continuously at Her Majesty's since 1986.

The Bad Companions: The Bad Companions is a 1932 British comedy film directed by J. O. C. Orton and starring Nor Kiddie, Renee Gadd and Wallace Lupino.  The title is a reference to the 1929 novel "The Good Companions" by J. B. Priestley which was itself made into a film the following year.

Time and the Conways: Time and the Conways is a British play written by J. B. Priestley in 1937 illustrating J. W. Dunne's Theory of Time through the experience of a moneyed Yorkshire family, the Conways, over a period of nineteen years from 1919 to 1937.  Widely regarded as one of the best of Priestley's "Time Plays", a series of pieces for theatre which played with different concepts of Time (the others including "I Have Been Here Before", "Dangerous Corner" and "An Inspector Calls") it continues to be revived in the UK regularly.

When We Are Married: When We Are Married is a comedy by the English dramatist, J. B. Priestley.  It was first performed at the St. Martin's Theatre, London on 11 October 1938, and transferred to the larger Prince's Theatre in March 1939 and ran until 24 June of that year.

Last Holiday (1950 film): Last Holiday is a 1950 British film featuring Alec Guinness in his sixth starring role.  The low-key, dark comedy was written and co-produced by J. B. Priestley and directed by Henry Cass, featuring irony and wit often associated with Priestley.  Shooting locations included Bedfordshire and Devon.

The Linden Tree: The Linden Tree is a 1947 play by the English dramatist J. B. Priestley, "a key work in the immediate post-war theatre" in the opinion of critic Michael Billington.  It makes use of the Elgar Cello Concerto.

Supporting paragraphs: José Echegaray J. B. Priestley
Answer: John Boynton "J. B." Priestley