125678
Rafi was now able to secure an alliance with the Samanids of Transoxiana and neutralize Abu Talha , seizing Merv and Herat .
 Merv, Herat
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Merv, Herat