40560
The Percy Sladen Trust Expeditions to the Abrolhos Islands were two scientific expeditions , conducted in 1913 and 1915 under the leadership of Professor William John Dakin and funded by the Percy Sladen Trust .
 William John Dakin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 William John Dakin