8718
The movement of Ser - 130 is the principal cause of the observed clavulanate resistance .
 Chemical: Ser; Chemical: clavulanate
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: Ser; Chemical: clavulanate