Question: The first director of NASA's Manned Spacecraft Center sent a letter of receipt to the person who knit a sweater for what famous astronaut?

Context paragraphs:
The Reluctant Astronaut: The Reluctant Astronaut is a 1967 Universal Pictures feature film produced and directed by Edward Montagne and starring Don Knotts in a story about a carnival ride operator who is hired as a janitor at the Manned Spacecraft Center in Houston and is eventually sent into space.

Gwen Matthewman: Gwen Matthewman (1927 — 6 March 2014 (aged 86)) born in Streethouse, later of Featherstone, was an English Guinness World Record holder in knitting between 1980 and 2005.  In 1968 her knitting technique was analysed by Japanese professors in Tokyo, before Apollo 11's departure for the moon Gwen knitted a sweater for Neil Armstrong, receiving a letter of receipt from Robert R. Gilruth, the director of NASA's Manned Spacecraft Center, the sweater is held at the Ohio History Center, a copy of this sweater was worn by Danny Lloyd in the role of Danny Torrance in Stanley Kubrick's "The Shining".  Gwen knitted a sweater for boxer Richard Dunn prior to his The Ring, World Boxing Council (WBC) and World Boxing Association (WBA) World Heavyweight title defeat by Muhammad Ali at Olympiahalle, Munich, West Germany on Monday 24 May 1976.  She also appeared on Blue Peter, with Roy Castle, Norris McWhirter, and Ross McWhirter on Record Breakers in 1973, with David Frost on Breakfast with Frost, and Game for a Laugh.  Gwen set the world record with a speed of 111 stitches per minute in a test at Phildar's Wool Shop in Central Street, Leeds on Monday 29 September 1980.  Gwen appeared with David Letterman on Late Night with David Letterman alongside; Dana Delany, Lonnie Mack, and Sam Kinison, on Friday 13 April 1990.  Gwen Matthewman's word record was broken in 2005 by Miriam Tegals of the Netherlands who attained 118 stitches in one minute.

Gemini 3: Gemini 3 was the first manned mission in NASA's Gemini program, the second American manned space program.  On March 23, 1965, astronauts Gus Grissom and John Young flew three low Earth orbits in their spacecraft, which they nicknamed Molly Brown.  This was the ninth manned US spaceflight (including two X-15 flights over 100 kilometers), and the 17th world human spaceflight including eight Soviet flights.  It was also the final manned flight controlled from Cape Kennedy Air Force Station in Florida, before mission control functions were shifted to a new control center located at the newly opened Manned Spacecraft Center in Houston, Texas.

Space Task Group: The Space Task Group was a working group of NASA engineers created in 1958, tasked with managing America's manned spaceflight programs.  Headed by Robert Gilruth and based at the Langley Research Center in Hampton, Virginia, it managed Project Mercury and follow-on plans.  After President John F. Kennedy set the goal in 1961 for the Apollo Program to land men on the Moon, NASA decided a much larger organization and a new facility was required to perform the Task Group's function, and it was transformed into the Manned Spacecraft Center (now the Lyndon B. Johnson Space Center), located in Houston, Texas.

Johnson Space Center: The Lyndon B. Johnson Space Center (JSC) is the National Aeronautics and Space Administration's Manned Spacecraft Center, where human spaceflight training, research, and flight control are conducted.  It was built and leased to NASA by Joseph L. Smith & Associates, Inc.  It was renamed in honor of the late U.S. president and Texas native, Lyndon B. Johnson, by an act of the United States Senate on February 19, 1973.

Robert R. Gilruth: Robert Rowe Gilruth (October 8, 1913 – August 17, 2000) was an American aerospace engineer and an aviation/space pioneer who was the first director of NASA's Manned Spacecraft Center, later renamed the Lyndon B. Johnson Space Center.

Mars Excursion Module: The Mars Excursion Module (MEM) was a spacecraft proposed by NASA in the 1960s for use in a manned mission to Mars.  It formed part of Mars orbit rendezvous (MOR) and flyby-rendezvous mission profiles studied at NASA's Manned Spacecraft Center in the 1960s.  The Mars Excursion Module would have been a combination of a Mars lander, short-stay surface habitat, and ascent vehicle; the ascent stage performed the rendezvous.  The MEM would have been used for a 40-day stay on the Martian surface in the flyby-rendezvous mission profile or for a 10- to 40-day stay in the MOR profiles.

Shenzhou 9: Shenzhou 9 () was the fourth manned spacecraft flight of China's Shenzhou program, launched at 18:37:24 CST (10:37:24 UTC), 16 June 2012.  "Shenzhou 9" was the second spacecraft and first manned spacecraft to dock with the Tiangong 1 space station, which took place on 18 June.  The Shenzhou 9 spacecraft landed at 10:01:16 CST (02:01:16 UTC) on 29 June in Inner Mongolia Autonomous Region.  The mission's crew included the first Chinese female astronaut, Liu Yang.  The next mission was "Shenzhou 10", which launched on 11 June 2013.

Soyuz 2: Soyuz 2 (Russian: Союз 2 , Union 2) was an uncrewed spacecraft in the Soyuz family intended to be the target of a docking maneuver by the manned Soyuz 3 spacecraft.  It was intended to be the first docking of a manned spacecraft in the Soviet space program.  Although the two craft approached closely, the docking did not take place and the first successful Soviet docking of manned spacecraft took place in the joint Soyuz 4 and Soyuz 5 mission.

Lunar Flag Assembly: The Lunar Flag Assembly (LFA) was a kit containing a flag of the United States designed to be planted by astronauts on the Moon during the Apollo program.  Six such flag assemblies were planted on the Moon.  The nylon flags were hung on telescoping staffs and horizontal bars constructed of one-inch anodized aluminum tubes.  The flags were carried on the outside of the Apollo Lunar Module, most of them on the descent ladder inside a thermally insulated tubular case to protect them from exhaust gas temperatures calculated to reach 2000 °F .  The assembly was designed and supervised by Jack Kinzler, head of technical services at the Manned Spacecraft Center in Houston, Texas.  Six of the flags were ordered from a government supply catalog and measured 3 by ; the last one planted on the Moon was the slightly larger, 6 ft -wide flag which had hung in the Mission Operations Control Room in the Manned Spacecraft Center for most of the Apollo program.

Supporting paragraphs: Gwen Matthewman Robert R. Gilruth
Answer: Neil Armstrong