Question: Lazar Lyusternik and Israel Gelfand, have which mutual occupation?
Sentence (from "Samson Shatashvili"): Samson Lulievich Shatashvili (Georgian: სამსონი შათაშვილი, Russian: Самсон Лулиевич Шаташвили) is a theoretical and mathematical physicist who has been working at Trinity College Dublin, Ireland, since 2002.
Relevant evidence: No