1709
The Croatia national under-21 football team also known as Croatia under-21 ( s ) or Croatia U21 ( s ) is a youth association football national team which represents  Croatia  at this age level and is a feeder team for the  Croatia national football team  .
 country of headquarters: Croatia, Croatia national football team
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: Croatia, Croatia national football team