15539
 It has one of the lowest population densities of any of Iraq 's 18 provinces , with barely 1.3 million people , many of them living in the cities and towns along the Euphrates . 
 location contains: Iraq, Euphrates
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: 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} 
Answer:
 location contains: Iraq, Euphrates