With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The International Space Station functions as a research laboratory.
text_B: The International Space Station -LRB- ISS -RRB- is a space station , or a habitable artificial satellite , in low Earth orbit .. space station. space station. artificial satellite. satellite. low Earth orbit. low Earth orbit. Its first component launched into orbit in 1998 , and the ISS is now the largest man-made body in low Earth orbit and can often be seen with the naked eye from Earth .. low Earth orbit. low Earth orbit. naked eye. naked eye. The ISS consists of pressurised modules , external trusses , solar arrays , and other components .. solar arrays. solar arrays. ISS components have been launched by Russian Proton and Soyuz rockets , and American Space Shuttles .. Proton. Proton ( rocket family ). Soyuz. Soyuz ( spacecraft ). The ISS serves as a microgravity and space environment research laboratory in which crew members conduct experiments in biology , human biology , physics , astronomy , meteorology , and other fields .. microgravity. microgravity. space environment. space environment. biology. biology. human biology. human biology. physics. physics. astronomy. astronomy. meteorology. meteorology. other fields. Scientific research on the International Space Station. The station is suited for the testing of spacecraft systems and equipment required for missions to the Moon and Mars .. The ISS maintains an orbit with an altitude of between 330 and by means of reboost manoeuvres using the engines of the Zvezda module or visiting spacecraft .. maintains an orbit with an altitude. Orbital station-keeping. Zvezda. Zvezda ( ISS module ). It completes orbits per day .. The ISS is the ninth space station to be inhabited by crews , following the Soviet and later Russian Salyut , Almaz , and Mir stations as well as Skylab from the US .. space station. space station. Salyut. Salyut programme. Almaz. Almaz. Mir. Mir. Skylab. Skylab. The station has been continuously occupied for since the arrival of Expedition 1 on 2 November 2000 .. Expedition 1. Expedition 1. This is the longest continuous human presence in low Earth orbit , having surpassed the previous record of held by Mir .. low Earth orbit. low Earth orbit. Mir. Mir. The station is serviced by a variety of visiting spacecraft  : the Russian Soyuz and Progress , the American Dragon and Cygnus , the Japanese H-II Transfer Vehicle , and formerly the Space Shuttle and the European Automated Transfer Vehicle .. Soyuz. Soyuz ( spacecraft ). Space Shuttle. Space Shuttle. Progress. Progress ( spacecraft ). Dragon. SpaceX Dragon. Cygnus. Cygnus ( spacecraft ). H-II Transfer Vehicle. H-II Transfer Vehicle. Automated Transfer Vehicle. Automated Transfer Vehicle. It has been visited by astronauts , cosmonauts and space tourists from 17 different nations .. 17 different nations. List of International Space Station visitors. After the US Space Shuttle programme ended in 2011 , Soyuz rockets became the only provider of transport for astronauts at the International Space Station , and Dragon became the only provider of bulk cargo return to Earth -LRB- called downmass -RRB- .. Soyuz. Soyuz ( spacecraft ). Space Shuttle. Space Shuttle. Dragon. SpaceX Dragon. downmass. downmass. Soyuz has very limited downmass capability .. Soyuz. Soyuz ( spacecraft ). downmass. downmass. The ISS programme is a joint project among five participating space agencies  : NASA , Roscosmos , JAXA , ESA , and CSA .. ISS programme. International Space Station program. NASA. NASA. Roscosmos. Roscosmos State Corporation. JAXA. JAXA. ESA. European Space Agency. CSA. Canadian Space Agency. The ownership and use of the space station is established by intergovernmental treaties and agreements .. space station. space station. The station is divided into two sections , the Russian Orbital Segment -LRB- ROS -RRB- and the United States Orbital Segment -LRB- USOS -RRB- , which is shared by many nations .. Russian Orbital Segment. Russian Orbital Segment. United States Orbital Segment. US Orbital Segment. , the American portion of ISS is being funded until 2024 .. Roscosmos has endorsed the continued operation of ISS through 2024 but has proposed using elements of the Russian Orbital Segment to construct a new Russian space station called OPSEK .. space station. space station. Roscosmos. Roscosmos State Corporation. Russian Orbital Segment. Russian Orbital Segment. OPSEK. Orbital Piloted Assembly and Experiment Complex. On 28 March 2015 , Russian sources announced that Roscosmos and NASA had agreed to collaborate on the development of a replacement for the current ISS .. NASA. NASA. Roscosmos. Roscosmos State Corporation. NASA later issued a guarded statement expressing thanks for Russia 's interest in future co-operation in space exploration but fell short of confirming the Russian announcement .. NASA. NASA
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