13703
The release of Cipro in phosphate buffered saline ( PBS ) from the fibres was controlled by switching the redox state of Ppy . Cipro layer .
 Chemical: Cipro; Chemical: phosphate; Chemical: Ppy; Chemical: Cipro
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: Cipro; Chemical: phosphate; Chemical: Ppy; Chemical: Cipro