<prompt> Qedela umusho olandelayo: Phakathi neminyaka embalwa eyalandela ubuhlobo buka-Iwan Katz neqembu nokho baqhubeka buwohloka. Ngokungangabazeki indlela yakhe yokukhuluma ngokuqondile yakhumbuza uWalter Ulbricht nezinye izishoshovu zeqembu zesizukulwane esifanayo nomholi ukuthi kungani uKatz ayexoshwe eqenjini ngo-1926. Wayegxeka obala  <response>: izinyanga eziyishumi nambili zokuvinjelwa kweBerlin yiSoviet okwaqalwa ngoJuni 1948, wahlanganyela umbono wakhe ngokuqinile nezithunywa ezikanye naye engqungqutheleni yeqembu lesifunda eZehlendorf ekupheleni konyaka, futhi wathatha ithuba lokuhlasela uhlelo lweminyaka emibili lukahulumeni lwakamuva. Ngalesi sikhathi, ngenxa yesifiso sakhe esisha sokuphikiswa, uKatz wayesephenywa iqembu. Ngo-December 21, 1948 indoda eyayisusiwe esikhundleni sikahulumeni uhulumeni kaHitler ngo-March 1933 yasuswa esikhundleni okwesibili, kulokhu nguhulumeni ka-Ulbricht, uhlobo olusha lombuso wobushiqela obumbene. Abahlaziyi bayaqaphela ukuthi lokhu kuyindida. Cishe emasontweni ayishumi nanye kamuva, ngo-14 Mashi 1949, u-Iwan Katz wasula ekubeni yilungu leqembu lakhe. Ngemva kwezinyanga ezimbili, ngo-May 12, 1949, waphinde wajoyina i-SPD. 