1730
Officers from the Singapore Army Republic of Singapore Navy and Republic of Singapore Air Force begin their training at the Officer Cadet School ( OCS ) before proceeding on to the  SAF Advanced Schools  and the  Singapore  Command and Staff College ( SCSC ) at various stages of their careers .
 None
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:
 NA: SAF Advanced Schools, Singapore