14931
Design of formulation to obtain 12 h , zero - order release and rapid floatation was done by varying the grades , quantity of PEO and sodium bicarbonate .
 Chemical: PEO; Chemical: sodium bicarbonate
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: PEO; Chemical: sodium bicarbonate