15762
Colour and its stability strongly depended on the amount of ferric ions and the plant source ; however , colour decay could generally be described as a pseudo - first - order kinetics .
 Chemical: ferric
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: ferric