19718
 The two trials , conducted by researchers from universities in Illinois , Maryland , Canada , Uganda and Kenya , involved nearly 3,000 heterosexual men in Kisumu , Kenya , and nearly 5,000 in Rakai , Uganda . 
 location contains: Kenya, Kisumu
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:  Kenya, Kisumu 
Answer:
 location contains: Kenya, Kisumu