Question: What is the full name of the eldest sibling who performed for the Empress Maria Theresa at the Imperial Court during a visit to Vienna in 1762?
Sentence (from "Maria Theresa (film)"): Maria Theresa (German: Maria Theresia) is a 1951 Austrian historical drama film directed by  Emil E. Reinert and starring  Paula Wessely, Fred Liewehr and Marianne Schönauer.
Relevant evidence: No