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Heinz Rutishauser 's father died when he was 13 years old and his mother died three years later, so tog ETH Zurich, main campus er with his younger brother and sister he went to live in their uncle's home. From 1936, Rutishauser studied mathematics at the ETH Zrich where he graduated in 1942. From 1942 to 1945 he was assistant of Walter Saxer at the ETH and from 1945 to 1948 a mathematics teacher in Glarisegg and Trogen. In 1948 he received his PhD from ETH with a well-received thesis on complex analysis.
 education institution: Heinz Rutishauser, ETH Zurich, main campus
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
 Entity Pairs:  Heinz Rutishauser, ETH Zurich, main campus 
Answer:
 education institution: Heinz Rutishauser, ETH Zurich, main campus