10308
Reactive functional groups ( e . g . , an amino group and a hydroxyl group ) are usually hydrophilic , which makes it difficult to display them on a dry polymer surface .
 Chemical: amino; Chemical: hydroxyl
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: amino; Chemical: hydroxyl