228423
This is how John L. Motley in his work History of the United Netherlands From the Death of William the Silent to the Twelve Years ' Truce , 1609 describes his death during the campaign of 1592 of Henry IV against the army of Catholic League , ' They [ i.e. Leaguers ] were closely followed by Henry at the head of his cavalry , and lively skirmishes were of frequent occurrence .
 IV
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 IV