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President Martin van Buren ignored the demands for repatriation , leading Lord Palmerston to threaten that a continued refusal to repatriate McLeod would result in " war immediate and frightful in its character , because it would be a war of retaliation and vengeance " .
 person: Martin van Buren; person: Lord Palmerston; person: McLeod
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:
 person: Martin van Buren; person: Lord Palmerston; person: McLeod