4385
Changes in the oil were assessed by the free fatty acid ( FFA ) content , p - anisidine value ( AnV ) , colour , viscosity , fatty acid profile and concentration of tocols .
 Chemical: fatty acid; Chemical: p - anisidine; Chemical: fatty acid
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: fatty acid; Chemical: p - anisidine; Chemical: fatty acid