245468
Trebonius Gallus was to aid Spurinna and when Vitellius ’ general Aulus Caecina Alienus , tried to storm Placentia .
 Trebonius Gallus, Vitellius, Aulus Caecina Alienus, Placentia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Trebonius Gallus, Vitellius, Aulus Caecina Alienus, Placentia