30682
However , early allusions to this people are present in ancient Greek and Latin authors previous to the conquest , and it allows the reconstruction of a few historical events of this people since the second century BCThanks to Silius Italicus , it 's known that between the years 218 and 201 BC , during the Second Punic War , some Gallaecian troops were involved in the fight in the ranks of Carthaginian Hannibal against the Roman army of Scipio Africanus .
 Silius Italicus, Hannibal, Scipio Africanus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Silius Italicus, Hannibal, Scipio Africanus