Question: On which Expedition did Clayton Anderson replace Sunita Williams? 
Context: Simeon H. Anderson (March 2, 1802 – August 11, 1840) was a United States Representative from Kentucky.  Anderson was the father of William Clayton Anderson who also served as a Representative from Kentucky.  He was born near Lancaster, Kentucky where he pursued preparatory studies.  In addition, he studied law and was admitted to the bar in 1823 and commenced practice in Lancaster, Kentucky. Expedition 14 was the 14th expedition to the International Space Station (ISS).  Commander Michael López-Alegría, and flight engineer Mikhail Tyurin launched from Baikonur Cosmodrome on 18 September 2006, 04:09 UTC, aboard Soyuz TMA-9.  They joined Thomas Reiter, who had arrived at the ISS on 6 July 2006 aboard Space Shuttle "Discovery" during mission STS-121.  In December 2006, "Discovery" mission STS-116 brought Sunita Williams to replace Reiter as the third member of Expedition 14.  On 21 April 2007, López-Alegría and Tyurin returned to Earth aboard TMA-9.  Landing occurred at 12:31:30 UTC. Sunita Lyn "Suni" Williams (born September 19, 1965) is an American astronaut and United States Navy officer of Indian-Slovenian descent.  She formerly held the records for total spacewalks by a woman (seven) and most spacewalk time for a woman (50 hours, 40 minutes).  Sunita was assigned to the International Space Station as a member of Expedition 14 and Expedition 15.  In 2012, she served as a flight engineer on Expedition 32 and then commander of Expedition 33. Albert Gallatin Talbott (April 4, 1808 – September 9, 1887) was a United States Representative from Kentucky and the uncle of William Clayton Anderson.  He was born near Paris, Kentucky and he moved with his parents to Clark County, Kentucky in 1813 and to Jessamine County, Kentucky in 1818.  For education, he attended Forrest Hill Academy, Jessamine County, Kentucky and also studied law, but did not practice.  He engaged in agricultural pursuits and general trading in 1831 before he moved to Mercer County, Kentucky in 1838 and engaged in the real estate business.  He moved to Danville, Kentucky in 1846. Monroe Dunaway Anderson (1873–1939) was a banker and cotton trader from Jackson, Tennessee.  With William L. Clayton, Anderson built Anderson, Clayton and Company (formed in 1904 by his brother Frank E. Anderson and Frank's brother-in-law, William L. Clayton) into the world's biggest cotton company.  In the event of one of their deaths, the partnership would lose a large amount of money to estate taxes and might be forced to dissolve.  In order to avoid this, Anderson created the M.D. Anderson Foundation with an initial sum of $300,000.  In 1939, after Anderson's death the foundation received an additional $19 million. Anderson Icefalls ( ) is an icefall at the lower end of Pitkevitch Glacier terminating in a cliff face 30 m high, located just southeast of Atkinson Cliffs along the north coast of Victoria Land.  Charted in 1911 by Commander Victor Campbell's Northern Party of the British Antarctic Expedition, 1910–13.  Named by the British Antarctic Expedition probably for Mr. Anderson of the firm, John Anderson and Sons, Engineers, who owned Lyttelton Foundry, and took great interest in the expedition. William Clayton Anderson (December 26, 1826 – December 23, 1861) was a nineteenth-century lawyer and politician.  He served as a United States Representative from Kentucky. Clayton Conrad Anderson (born February 23, 1959) is a retired NASA astronaut.  Launched on STS-117, he replaced Sunita Williams on June 10, 2007 as a member of the ISS Expedition 15 crew. Gary Clayton Anderson (born April 2, 1948) is a professor of history at the University of Oklahoma at Norman, Oklahoma, known for his specialization in the American Indians of the Great Plains and the Southwest. Jerald Clayton Anderson (April 4, 1934 – January 7, 2014) was an American dentist and politician.
Answer: Expedition 15