52783
In 1909 , Ernest Rutherford discovered that the bulk of the atomic mass was tightly condensed into a nucleus , which was also found to be positively charged .
 person: Ernest Rutherford
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: Ernest Rutherford 
Answer:
 person: Ernest Rutherford