Question: What are the current or past space stations ?
Answers:
answer_text: Salyut 1
answer_text: DOS-2   
answer_text: Salyut 2  
answer_text: Kosmos 557  
answer_text: Skylab
answer_text: Salyut 3
answer_text: Salyut 4
answer_text: Salyut 5
answer_text: Salyut 6
answer_text: Salyut 7
answer_text: Mir
answer_text: Tiangong-1
answer_text: Tiangong-2
answer_text: Lunar Gateway
answer_text: Russian Orbital Service Station (ROSS)
answer_text: Lunar Orbital Station   (LOS)
answer_text: Manned Orbiting Laboratory 1–7
answer_text: Skylab B
answer_text: OPS-4
answer_text: Freedom
answer_text: Mir-2
answer_text: [[Columbus Man-Tended Free Flyer|Columbus MTFF]]
answer_text: [[Galaxy (spacecraft)|Galaxy]]
answer_text: [[Excalibur Almaz|Almaz commercial]]
answer_text: OPSEK