Original sentence: Sigmund Jähn became the first German spacefarer.Soyuz 31 (, Union 31) was an Intercosmos mission to Salyut 6.Soyuz 31 docked with Salyut 6
Edited sentence: Cosmonauts Bykovsky and Jahn were greeted by resident crew Vladimir Kovalyonok and Aleksandr Ivanchenkov when they docked with the Salyut 6 space station the next day.It was the seventh mission to and sixth successful docking at the orbiting facility.Medical and biological experiments were carried out, including an audio experiment which tested sound and noise perception limits.Soyuz 31 (, Union 31) was a 1978 Soviet manned space flight to the Salyut 6 space station.Soyuz 31 carried Valery Bykovsky and Sigmund Jähn, the first German cosmonaut, into space.The Soyuz 31 crew were the second to visit the long-duration Soyuz 29 resident crew.The third Intercosmos flight was launched 26 August 1978.The visitors brought with them fresh onions, garlic, lemons apples and other food for the long-duration crew, then in space for more than two months