17563
A rail line between Khaf , Iran and Herat , western Afghanistan , intended for both freight and passengers , is under construction as of 2019 .
 Khaf, Iran, Herat, Afghanistan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Khaf, Iran, Herat, Afghanistan