Original sentence: In 1989, WordPerfect Corporation released the program's most successful version ever, WordPerfect 5.1 for DOS, which was the first version to include Macintosh-style pull-down menus to supplement the traditional F-key combinations, as well as support for tables, a spreadsheet-like feature
Edited sentence: On 6 November, 1989, WordPerfect Corporation released the program's most successful version ever, WordPerfect 5.1 for DOS, which was the first version to include Macintosh-style pull-down menus to supplement the traditional F-key combinations, as well as support for tables, a spreadsheet-like feature