10774
The major river flowing into the lake is the Ruzizi River , formed about 10,000 years ago , which enters the north of the lake from Lake Kivu .
 location: Ruzizi River; location: Lake Kivu
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: Ruzizi River; location: Lake Kivu