23978
 The new $ 25 option for same-day travel changes is only allowed on flights in the United States , Puerto Rico , the United States Virgin Islands and to the Caribbean , and it 's similar to options offered by Northwest and Delta . 
 location contains: Caribbean, Puerto Rico
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Caribbean, Puerto Rico 
Answer:
 location contains: Caribbean, Puerto Rico