10441
TriMet 's fleet of commuter-rail cars consists of three powered cars and one " control trailer " , a type of car which is n't powered but has an operating cab at one end and can control the powered car to which it is coupled .
 TriMet
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 TriMet