Given the following reasoning and answer, what was the question? The important part for answering this question is: Russian cosmonaut Gennady Padalka, who has spent 878 days in space over five missions, became the record holder for the most time spent in space when he surpassed, on 28 June 2015, the record of cosmonaut Sergei Krikalev, who spent 803 days, 9 hours and 39 minutes (about 2.2 years) in space over the span of six spaceflights on Soyuz, the Space Shuttle, Mir, and the International Space Station.
The answer: Gennady Padalka
The question Passage: Russian cosmonaut Gennady Padalka, who has spent 878 days in space over five missions, became the record holder for the most time spent in space when he surpassed, on 28 June 2015, the record of cosmonaut Sergei Krikalev, who spent 803 days, 9 hours and 39 minutes (about 2.2 years) in space over the span of six spaceflights on Soyuz, the Space Shuttle, Mir, and the International Space Station. Yuri Malenchenko is currently in second place, having spent 828 days in space on six spaceflights.

Question: Based on this passage, who has spent the most time in space?