6764
The macromolecular structure ( linear / graft ) and nature ( presence / absence of hydroxyl groups ) of the polymeric arms respectively impact the photodynamic activity and the stealthiness of the nanohybrids .
 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: hydroxyl