Out of all the results for S. Klugman only Sara Klugman born 9 May 1925 was born between the years 1921 and 1927. She lived at Am Bach 10 flat 10, Kelm 81 flat 4, and Insel 26. She had an unknown date of 12.12.42 and a move date of 9.11.42 to Am Bach 10.
I found the following people living at Am Bach 10 flat 12 and Insel 26 flat 41. Szyja Klugman born 6 Dec 1899, Malka Jenta Klugman (Dob) born 1898, Abram Mojsie Klugman born 20 July 1922, and Rena Klugman born 25 Dec 1927. I'm guessing they are Sara's father, mother, and siblings.
I found on USC Shoah Foundation a survivors testimony for (Interview code 9082) Sarah Urbah (maiden name Klugman) and born 9 May 1925 in Lodz, Poland to Malkah and Yehoshua Ḳlugman. She had a sister named Renyah and a brother named Abrahm and she was in the Lodz Ghetto, Auschwitz, Hainichen, and Theresienstadt where she was liberarted. Her video isn't viewable online so this is the only information I could get. Given the information I think we can assume this Sarah is the same Sara from stage one.