330368
Background In 1788 , Sir William Dolben , led a group of his fellow Members of Parliament to see a ship being fitted for a slaving voyage on the River Thames .
 person: Sir William Dolben
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: Sir William Dolben 
Answer:
 person: Sir William Dolben