22274
In this study , we examined whether baby aloe shoot extract ( BAE , immature aloe extract ) , which is from the one - month - old shoots of Aloe vera , and adult aloe shoot extract ( AE ) , which is from the four - month - old shoots of Aloe vera , have a protective effect on UVB - induced skin photoaging in normal human dermal fibroblasts ( NHDFs ) .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None