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Groups of Alfred Witte 's Astrology ( " Uranians " ) Trans-Neptunian hypothesis In Wiite 's times , many Astronomers proposed hypothetical Trans-Neptunian objects .
 Alfred Witte
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alfred Witte