1110
Before Amtrak stopped carrying mail in 2005 , it stored material handling cars ( MHCs ) at the plaza on several unused platform tracks .
 organization: Amtrak
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: Amtrak