19959
Parathyroid hormone ( PTH ) and parathyroid hormone related peptide ( PTHrP ) , acting through the osteoblast PTH1R , play important roles in bone remodeling .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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