Question: are John Galsworthy and Mary Higgins Clark both nationals of the same country ?

Context paragraphs:
Carol Higgins Clark: Carol Higgins Clark (born July 28, 1956) is an American mystery author and actress.  She is the daughter of suspense writer Mary Higgins Clark, with whom she has co-authored several Christmas novels, and the former sister-in-law of author Mary Jane Clark.

Mary Higgins Clark: Mary Theresa Eleanor Higgins Clark Conheeney (née Higgins; born December 24, 1927), known professionally as Mary Higgins Clark, is an American author of suspense novels.  Each of her 51 books has been a bestseller in the United States and various European countries, and all of her novels remained in print as of 2015, with her debut suspense novel, "Where Are The Children", in its seventy-fifth printing.

No Place Like Home (novel): No Place Like Home is a thriller novel written by Mary Higgins Clark and published in 2005.

Learning to Swim (book): Learning to Swim (ISBN  ) is a book written by Sara J. Henry and published by Crown Publishing Group (now owned by Penguin Random House) on 22 February 2011 which later went on to win the Mary Higgins Clark Award in 2012.

The Other Woman (book): The Other Woman (ISBN  ) is a book written by Hank Phillippi Ryan and was originally published by Forge Books ("later acquired by Tor Books and currently owned by Macmillan Publishers") on 4 September 2012 which then went on to win the Mary Higgins Clark Award in 2013.

Rochelle Majer Krich: Rochelle Majer Krich (born 1947) is a writer of mystery novels and winner of an Anthony Award and the Mary Higgins Clark Award.

I'll Be Seeing You (2004 film): I'll Be Seeing You, also known as "Mary Higgins Clark's I'll Be Seeing You", is a 2004 television film based on the novel by Mary Higgins Clark starring Alison Eastwood and Mark Humphrey.

Deck the Halls (novel): Deck The Halls is a 2003 thriller novel by Mary Higgins Clark and Carol Higgins Clark.

Haven't We Met Before?: Haven't We Met Before?  is a 2002 mystery film starring Nicollette Sheridan, Page Fletcher, Anthony Lemke and Daniela Amavia.  It was directed by René Bonnière and written by Mary Higgins Clark and John Rutter.

John Galsworthy: John Galsworthy {'1': ", '2': ", '3': ", '4': "} ( ; 14 August 1867 – 31 January 1933) was an English novelist and playwright.  Notable works include "The Forsyte Saga" (1906–1921) and its sequels, "A Modern Comedy" and "End of the Chapter".  He won the Nobel Prize in Literature in 1932.

Supporting paragraphs: John Galsworthy Mary Higgins Clark
Answer: no