Question: When did the person that Pavel Belyayev traveled with conduct extravehicular activity in space?

Context paragraphs:
Claude Nicollier: Claude Nicollier (born 2 September 1944 in Vevey, Switzerland) is the first astronaut from Switzerland.  He has flown on four Space Shuttle missions.  His first spaceflight (STS-46) was in 1992, and his final spaceflight (STS-103) was in 1999.  He took part in two servicing missions to the Hubble Space Telescope (called STS-61 and STS-103).  During his final spaceflight he participated in a spacewalk, becoming the first European Space Agency astronaut to do so during a Space Shuttle mission (previous ESA astronauts conducted spacewalks aboard "Mir", see List of spacewalks and moonwalks 1965–1999).  In 2000 he was assigned to the Astronaut Office Extravehicular Activity Branch, while maintaining a position as Lead ESA Astronaut in Houston.  Nicollier retired from ESA in April 2007.

Berkut spacesuit: The Berkut (Russian Беркут, meaning "golden eagle") is a space suit model developed to be used for extravehicular activity for the Voskhod 2 mission aboard a Voskhod spacecraft on the first spacewalk.  It was developed by NPP Zvezda in 1964-1965.  It was a modified SK-1 suit.  It was only used by the Voskhod 2 crew.

SEATEST II: SEATEST II, an acronym for Space Environment Analog for Testing EVA Systems and Training (number two), is a NASA underwater mission, formerly known as NEEMO XVII, in the Aquarius underwater laboratory in preparation for future space exploration.  The objectives for this exercise are largely focused on the evolution of EVA (extravehicular activity) tools, and maturing some technologies that could have implications for the ISS and future exploration missions (MED and JITT delivery.)

Dana Weigel: Dana J. Weigel became a flight director at NASA in 2005.  She has also been leading the research on Space Shuttle repair methods in order to prevent disasters during reentry back to earth.  She also supervised Extravehicular Activity (EVA) on STS-109.  She is a 1993 graduate of Texas A&M University.

Voskhod 2: Voskhod 2 (Russian: Восход-2 )(English: Sunrise-2) was a Soviet manned space mission in March 1965.  The Vostok-based Voskhod 3KD spacecraft with two crew members on board, Pavel Belyayev and Alexey Leonov, was equipped with an inflatable airlock.  It established another milestone in space exploration when Alexey Leonov became the first person to leave the spacecraft in a specialized spacesuit to conduct a 12 minute "spacewalk".

Alexey Leonov: Alexey Arkhipovich Leonov (Russian: Алексе́й Архи́пович Лео́нов ; ] ; born 30 May 1934 in Listvyanka, West Siberian Krai, Soviet Union) is a retired Soviet/Russian cosmonaut, Air Force Major general, writer and artist.  On 18 March 1965, he became the first human to conduct extravehicular activity (EVA), exiting the capsule during the Voskhod 2 mission for a 12-minute spacewalk.

EASE/ACCESS: The Experimental Assembly of Structures in EVA and the Assembly Concept for Construction of Erectable Space Structures, or EASE/ACCESS, were a pair of space shuttle flight experiments that were performed on STS-61-B, on November 29 and December 1, 1985.  The purpose of the experiments was to study how quickly astronauts would become proficient at assembling space structures during extravehicular activity, and how quickly they would become fatigued, and to explore various construction and maintenance techniques.  In particular, researchers studied the applied moments of inertia arising in the manual assembly of a large space structure.

Space suit: A space suit is a garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes.  Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, and are necessary for extravehicular activity (EVA), work done outside spacecraft.  Space suits have been worn for such work in Earth orbit, on the surface of the Moon, and en route back to Earth from the Moon.  Modern space suits augment the basic pressure garment with a complex system of equipment and environmental systems designed to keep the wearer comfortable, and to minimize the effort required to bend the limbs, resisting a soft pressure garment's natural tendency to stiffen against the vacuum.  A self-contained oxygen supply and environmental control system is frequently employed to allow complete freedom of movement, independent of the spacecraft.

AERCam Sprint: The Autonomous Extravehicular Activity Robotic Camera Sprint (AERCam Sprint) is a NASA experiment to demonstrate the use of a prototype free-flying television camera.  It was tested on STS-87 and could also be used for remote inspections of the exterior of the International Space Station.

Extravehicular activity: Extravehicular activity (EVA) is any activity done by an astronaut or cosmonaut outside a spacecraft beyond the Earth's appreciable atmosphere.  The term most commonly applies to a spacewalk made outside a craft orbiting Earth (such as the International Space Station), but also has applied to lunar surface exploration (commonly known as moonwalks) performed by six pairs of American astronauts in the Apollo program from 1969 to 1972.  On each of the last three of these missions, astronauts also performed deep-space EVAs on the return to Earth, to retrieve film canisters from the outside of the spacecraft.  Astronauts also used EVA in 1973 to repair launch damage to Skylab, the United States' first space station.

Supporting paragraphs: Voskhod 2 Alexey Leonov
Answer: 18 March 1965