Question: What was the nickname of the Soviet defector to the United States in 1967 who was married to the Russian chemistry professor and rector Yuri Zhdanov?
Sentence (from "Yuri Zhdanov"): Yuri Andreyevich Zhdanov (Russian: Ю́рий Андре́евич Жда́нов ; 20 August 1919 – 19 December 2006) was a Russian chemistry professor and rector of the University of Rostov.
Relevant evidence: Yes