192922
The Stave delta , formerly an oxbow lake , was partly drained and dyked to form Silvermere Lake , part of a 1950s vintage real estate development ; the oxbow 's central island was transformed by the dredgings into a hill upon which private developer Ned Hullah 's private estate was built .
 None
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:  
Answer:
 None