what is the longest amount of time someone has been in space

Question: what is the longest amount of time someone has been in space
- Keywords:
  time
Asked by Lebron James to Col Op, Elie, Floris, Jenn, RocketRich on 4 Mar 2016.
- Jenn Wadsworth answered on 4 Mar 2016:
  
  Scott Kelly, who has just returned to earth, holds the record amongst the Americans, at 340 days in space. However, the longest anyone has every spent in space in one go is 437 days, a record held by the Russian Cosmonaut Valeri Polyakov!

Question: what is the longest amount of time someone has been in space