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India also provided army contingent performing a peacekeeping operation in  Sri Lanka  between 1987 and 1990 as  Indian Peace Keeping Force  and in November 1988 India also helped restore government of Maumoon Abdul Gayoom in Maldives under Operation Cactus.Indian Navy Destroyer In Anti-Piracy Action On Sept 5 India sought to augment its naval force in the Gulf of Aden by deploying the larger INS Mysore to patrol the area .
 country of headquarters: Sri Lanka, Indian Peace Keeping Force
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:
 country of headquarters: Sri Lanka, Indian Peace Keeping Force