30759
The last conquest brought them to the mouth of the Ebro and gave them raiding access to Valencia , prompting the Emir al-Hakam I to recognise their conquests in 813 .
 Ebro, Valencia, al-Hakam I
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ebro, Valencia, al-Hakam I