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The  Special Task Force  ( STF ) ( Sinhala : Tamil : ) is an elite special forces unit of the  Sri Lanka Police  Service specializing in Counter-Terrorist and Counter-Insurgency operations .
 subsidiaries: Special Task Force, Sri Lanka Police
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: Special Task Force, Sri Lanka Police