26565
Using this methodology , alpha - keto acids were found to be present in pork meat to a low extent , and their concentration increased when they were determined in Iberian ham .
 Chemical: alpha - keto acids
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: alpha - keto acids