137
Many archaeologists continue to refer to this structure as a henge ; for example , Aubrey Burl classifies the ditch as a Class II henge ; one that has two opposing entrances , in this case on the north-west and south-east .
 person: Aubrey Burl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Aubrey Burl