Title: Mark Twain
Content:  Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer. He was lauded as the "greatest humorist the United States has produced," and William Faulkner called him "the father of American literature". His novels include The Adventures of Tom Sawyer (1876) and its sequel, Adventures of Huckleberry Finn (1884), the latter of which has often been called the "Great American Novel". Twain was raised in Hannibal, Missouri, which later provided the setting for Tom Sawyer and Huckleberry Finn. He served an apprenticeship with a printer and then worked as a typesetter, contributing articles to the newspaper of his older 
Title: Mark Twain
Content:  Samuel Langhorne Clemens was born on November 30, 1835, in Florida, Missouri. He was the sixth of seven children of Jane (née Lampton; 1803–1890), a native of Kentucky, and John Marshall Clemens (1798–1847), a native of Virginia. His parents met when his father moved to Missouri. They were married in 1823. Twain was of Cornish, English, and Scots-Irish descent. Only three of his siblings survived childhood: Orion (1825–1897), Henry (1838–1858), and Pamela (1827–1904). His brother Pleasant Hannibal (1828) died at three weeks of age, his sister Margaret (1830–1839) when Twain was three, and his brother Benjamin (1832–1842) three years later. When he was 
Title: John Marshall Clemens
Content:  John Marshall Clemens (August 11, 1798 – March 24, 1847) was the father of author Mark Twain.
Title: Mark Twain bibliography
Content:   Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), well known by his pen name Mark Twain, was an American author and humorist. Twain is noted for his novels Adventures of Huckleberry Finn (1884), which has been called "the Great American Novel," and The Adventures of Tom Sawyer (1876). He also wrote poetry, short stories, essays, and non-fiction.
Title: Mark Twain
Content:  Twain's family moved to Hannibal, Missouri, a port town on the Mississippi River that inspired the fictional town of St. Petersburg in The Adventures of Tom Sawyer and the Adventures of Huckleberry Finn. Slavery was legal in Missouri at the time, and it became a theme in these writings. His father was an attorney and judge, who died of pneumonia in 1847, when Twain was 11. The following year, Twain left school after the fifth grade to become a printer's apprentice. In 1851, he began working as a typesetter, contributing articles and humorous sketches to the Hannibal Journal, a newspaper that Orion owned. 
Title: Cornish Americans
Content: Mark Twain - Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), better known by his pen name Mark Twain, was an American author and humorist. He is noted for his novels Adventures of Huckleberry Finn (1885), called "the Great American Novel", and The Adventures of Tom Sawyer (1876). The Clemens family originally came from Looe, Cornwall. ; Richard Bullock - became a legendary figure of the Wild West cowboy era. His quick-shooting deeds working on the Deadwood stage gained him the nickname "Deadwood Dick". ; Colin Trevorrow - an American film director and screenwriter. The surname Trevorrow originating in the village of Ludgvan near Penzance. ; Jayne Mansfield - an American actress 
Title: Mark Twain in popular culture
Content: Mark Twain Birthplace State Historic Site is preserved in Florida, Missouri ; The Mark Twain Boyhood Home & Museum in Hannibal, Missouri preserves the setting for some of the author's best known work; it was designated a National Historic Landmark on December 29, 1962. ; Mark Twain Cabin on Mark Twain Bret Hart Trail (erected by Tuolumne County Chamber of Commerce in 1926), was a stopping place for packers carrying supplies to miners and the site where Twain wrote "The Celebrated Jumping Frog of Calaveras County", from notes made at Angels Camp Tavern. ; Mark Twain Family Cabin, believed to have belonged to Twain's father, John Marshall Clemens, and may have been where the author's 
Title: Mark Twain House
Content:  The Mark Twain House and Museum in Hartford, Connecticut, was the home of Samuel Langhorne Clemens (Mark Twain) and his family from 1874 to 1891. It was designed by Edward Tuckerman Potter and built in the American High Gothic style. Clemens biographer Justin Kaplan has called it "part steamboat, part medieval fortress and part cuckoo clock." Clemens wrote many of his best-known works while living there, including The Adventures of Tom Sawyer, The Prince and the Pauper, Life on the Mississippi, Adventures of Huckleberry Finn, A Tramp Abroad, and A Connecticut Yankee in King Arthur's Court. Poor financial investments prompted the Clemens family to move to Europe in 1891. The 
Title: Mark Twain
Content:  family summered at Quarry Farm in Elmira, the home of Olivia's sister, Susan Crane. In 1874, Susan had a study built apart from the main house so that Twain would have a quiet place in which to write. Also, he smoked cigars constantly, and Susan did not want him to do so in her house. Twain wrote many of his classic novels during his 17 years in Hartford (1874–1891) and over 20 summers at Quarry Farm. They include The Adventures of Tom Sawyer (1876), The Prince and the Pauper (1881), Life on the Mississippi (1883), Adventures of Huckleberry Finn (1884), and A Connecticut Yankee in King Arthur's Court (1889). The couple's marriage lasted 34 years until Olivia's death in 1904. All of the Clemens family are buried in Elmira's Woodlawn Cemetery.
Title: Mark Twain Boyhood Home &amp; Museum
Content:  The Mark Twain Boyhood Home & Museum is located on 206-208 Hill Street, Hannibal, Missouri, on the west bank of the Mississippi River in the United States. It was the home of Samuel Langhorne Clemens, better known as author Mark Twain, from 1844 to 1853. Clemens found the inspiration for many of his stories, including the white picket fence, while living here. It has been open to the public as a museum since 1912, and was designated a National Historic Landmark on December 29, 1962. It is located in the Mark Twain Historic District.

Question: Who is the father of Mark Twain?
Answer: John Marshall Clemens.