World record progression 100 metres backstroke

Columns: Time | Swimmer | Date | Place
59.41 | Angel Martino | November 21 , 1993 | Stavanger , Norway | 58.50 | Angel Martino | December 3 , 1993 | Palma de Mallorca , Spain | 58.45 | Reiko Nakamura | March 4 , 2001 | Sagamihara , Japan | 57.08 | Natalie Coughlin | November 29 , 2001 | East Meadow , New York , United States | 56.71 | Natalie Coughlin | November 23 , 2002 | East Meadow , New York , United States | 56.51 | Natalie Coughlin | October 28 , 2007 | Singapore | 56.15 | Shiho Sakai | February 22 , 2009 | Tokyo , Japan | 55.23 | Shiho Sakai | November 15 , 2009 | Berlin , Germany | 55.03 | Katinka Hosszú | December 4 , 2014 | Doha , Qatar | 54.89 | Minna Atherton | October 27 , 2019 | Budapest , Hungary

Example questions:
What was the first year the person who swam 100 meters short course with a backstroke in 58.45 seconds in Sagamihara was an Olympian ? | Which organization has categorized the city where someone set a record and backstroked 100 m short course in 56.15 as alpha+ ? | Which gulf is the city where someone set a record and backstroked 100 m short course in 55.03 west of ? | What is the earliest historical record of the city where someone set a record and backstroked 100 m short course in 55.23 ?

Answers:
2004 | Globalization and World Cities Research Network | Persian Gulf | 13th century