| 1 | A | B | C | D | E | F | G |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Sarah Sjöström - World records (50 m) |  |  |  |  |  |  |
| 3 | No. | Event | Time | Date | Meet | Location | Age |
| 4 | 1 | 100 m butterfly | 56.44 | 26 July 2009 | World Championships | Rome, Italy | 15 |
| 5 | 2 | 100 m butterfly (2) | 56.06 | 27 July 2009 | World Championships | Rome, Italy | 15 |
| 6 | 3 | 50 m butterfly | 24.43 | 5 July 2014 | Swedish Championships | Borås, Sweden | 20 |
| 7 | 4 | 100 m butterfly (3) | 55.74 | 2 August 2015 | World Championships | Kazan, Russia | 21 |
| 8 | 5 | 100 m butterfly (4) | 55.64 | 3 August 2015 | World Championships | Kazan, Russia | 21 |
| 9 | 6 | 100 m butterfly (5) | 55.48 | 7 August 2016 | Olympic Games | Rio de Janeiro, Brazil | 22 |
| 10 | 7 | 100 m freestyle | 51.71 | 23 July 2017 | World Championships | Budapest, Hungary | 23 |
| 11 | 8 | 50 m freestyle | 23.67 | 29 July 2017 | World Championships | Budapest, Hungary | 23 |

Question: In which swimming event did Sarah Sjöström improve her world record time?
Answer: In the 100 m butterfly, Sarah Sjöström improved her world record time to 56.06.