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The Syr Darya ( Jaxartes ) rises in the Ferghana valley and the Amu Darya ( Oxus ) rises in Bactria .
 Syr Darya, Jaxartes, Ferghana, Amu Darya, Oxus, Bactria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Syr Darya, Jaxartes, Ferghana, Amu Darya, Oxus, Bactria