Question: Who was a dentist as well as an author, Zane Grey or Thomas Sigismund Stribling?

Context paragraphs:
Fighting Caravans: Fighting Caravans is a 1931 American Pre-Code Western film directed by Otto Brower and David Burton and starring Gary Cooper, Lili Damita, and Ernest Torrence.  Based on the 1929 novel "Fighting Caravans" by Zane Grey, the film is about a young frontier scout who helps guide a freight wagon train across the country, fighting off Indians and evil traders, while his two crusty companions try to save him from falling in love.  Although billed as being based on the Zane Grey novel, the stories have little in common.  The film was actually written by Agnes Brand Leahy, Edward E. Paramore, Jr., and Keene Thompson.

Zane Grey Cabin: The Zane Grey Cabin on the Rogue River in Oregon is a cabin built in 1926 by Zane Grey (1872–1939), the master author of the American West.  Grey used it as a frequent retreat until 1935.

Thomas Sigismund Stribling: Thomas Sigismund Stribling (March 4, 1881 – July 8, 1965) was an American writer and lawyer who published under the name T.S. Stribling.  He won the Pulitzer Prize for the Novel in 1933 for his novel "The Store".

Zane Grey: Pearl Zane Grey (January 31, 1872 – October 23, 1939) was an American dentist and author best known for his popular adventure novels and stories associated with the Western genre in literature and the arts; he idealized the American frontier. " Riders of the Purple Sage" (1912) was his best-selling book.  In addition to the commercial success of his printed works, they had second lives and continuing influence when adapted as films and television productions.  His novels and short stories have been adapted into 112 films, two television episodes, and a television series, "Dick Powell's Zane Grey Theater".

Zane Grey Museum: The Zane Grey Museum in Lackawaxen Township, Pennsylvania, United States, is a former residence of the author Zane Grey and is now maintained as a museum and operated by the National Park Service (NPS).  It is located on the upper Delaware River and is on the National Register of Historic Places.  It contains many photographs, artworks, books, furnishings, and other objects of interest associated with Grey and his family.

The Store: The Store is a 1932 novel by Thomas Sigismund Stribling. It won the Pulitzer Prize for the Novel in 1933.  It is the second book of the "Vaiden" trilogy, comprising "The Forge", "The Store", and "Unfinished Cathedral".  All three books in the trilogy have been kept in print since the mid-1980s by the University of Alabama Press.

Romer Zane Grey: Romer Zane Grey (October 1, 1909 - March 8, 1976) was the eldest son of novelist Zane Grey.  Romer was born October 1, 1909 at Lackawaxen, Penn.  Zane and Dolly Grey had three children: Romer, Betty, and Loren.  Romer was named after an uncle Romer Carl Grey, known as Reddy Grey.

Zane Grey Highline Trail 50 Mile Run: The Zane Grey Highline Trail 50 mile Endurance Run, known commonly as the Zane Grey 50, is a 50-mile (80 km) ultramarathon that takes place on the Highline Trail in the Tonto National Forest just below the Mogollon Rim in central Arizona.  The race is typically held on the 4th Saturday in

Zane Grey Estate: The Zane Grey Estate is a National Register of Historic Places structure (site #02001187) in Altadena, California.  It was placed on the Register in 2002 for its association with author Zane Grey.

The Thundering Herd: The Thundering Herd is a 1933 American pre-Code Western film directed by Henry Hathaway and starring Randolph Scott, Judith Allen, Buster Crabbe, Noah Beery, Sr. and Harry Carey.  Based on the novel "The Thundering Herd" by Zane Grey, the film is about two buffalo hunters (portrayed by Randolph Scott and Harry Carey) who face dangers with the Indians and a gang of outlaws.  "The Thundering Herd" is a remake of the 1925 film "The Thundering Herd".  Both Noah Beery, Sr. and Raymond Hatton, Wallace Beery's frequent screen comedy partner during the late 1920s, reprised their roles.  The film is now in the public domain and also known as Buffalo Stampede, the title Favorite Films used in their 1950 reissue of the film.  Hathaway directed much of the same cast (Scott, Beery, Carey and Crabbe) that same year in another Zane Grey story, "Man of the Forest".

Supporting paragraphs: Zane Grey Thomas Sigismund Stribling
Answer: Zane Grey