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Additionally , ( 31 ) P chemical shift anisotropy ( CSA ) analysis indicates that the phosphates on phosphoserine residues are doubly ionized , and are charge - stabilized by divalent cations .
 Chemical: ( 31 ) P; Chemical: phosphates; Chemical: phosphoserine
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: ( 31 ) P; Chemical: phosphates; Chemical: phosphoserine