13711
Apart from their practical use , these 2 classes of polymers are also of interest from a fundamental point of view as they both can be prepared in different architectures ( linear and branched / dendritic ) and in a wide range of molecular weights , which is attractive to establish basic structure - activity relationships .
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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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