4937
In 1987 , he became one of the first artists to hold a rock and roll tour in the Soviet Union following the country 's alleviation of the ban on rock and roll music .
 location: Soviet Union
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Soviet Union