18371
It was first described by Eduard August von Regel in 1873 as a variety of " T. sylvestris , " then elevated to full species status two years later .
 person: Eduard August von Regel
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Eduard August von Regel 
Answer:
 person: Eduard August von Regel