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Paul Vixie is an American computer scientist whose technical contributions include Domain Name System DNS protocol design and procedure, mechanisms to achieve operational robustness Doctor of Philosophy DNS implementations, and significant contributions to open source software principles and methodology. He also created and launched the first successful commercial anti-spam service.
 Paul Vixie, Doctor of Philosophy
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 Paul Vixie, Doctor of Philosophy