29
Physical accessibility on the  Massachusetts Bay Transportation Authority  ( MBTA or the T ) system is incomplete but improving with accessibility on all buses ( including the  Silver Line  ) all Orange Line stations all but 2 Red Line stations and all but 2 Blue Line stations .
 subsidiaries: Massachusetts Bay Transportation Authority, Silver Line
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 subsidiaries: Massachusetts Bay Transportation Authority, Silver Line