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The largest of the northern troughs is named Saturnalia Fossa ( ≈ 40 " km wide , > 370 " km long ) .
 Saturnalia Fossa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Saturnalia Fossa