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After Valentinian I 's death in that same year , Merobaudes stated that he could control the army only if Valentinian 's son , Valentinian II , was to be appointed Emperor .
 Valentinian, Merobaudes, Valentinian, Valentinian II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Valentinian, Merobaudes, Valentinian, Valentinian II