17182
Africa was the location of US$ 4.6 billion or 2.5 % of Japanese foreign direct investment in 1988 , of which most ( US$ 3.6 billion ) was in Liberia .
 Liberia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Liberia