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But Gcaleka ran into trouble as soon as he returned to South Africa with a skull he found in a cottage in a lonely Highland forest near Inverness .
 Inverness, Gcaleka, South Africa, Highland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Inverness, Gcaleka, South Africa, Highland