16914
Considerable differences were revealed concerning total excretion levels ; lead acetate was excreted in amount greater extent than those of phytobound Pb .
 Chemical: lead acetate; Chemical: Pb
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: lead acetate; Chemical: Pb