78731
To cut construction time in half , four access tunnels were built so that construction could start at four different sites simultaneously : Erstfeld , Amsteg , Sedrun , and Faido .
 Erstfeld, Amsteg, Sedrun, Faido
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Erstfeld, Amsteg, Sedrun, Faido