52063
Meanwhile , Newton ( 1642 – 1727 ) derived the relationship for wave velocity in solids , a cornerstone of physical acoustics ( Principia , 1687 ) .
 person: Newton
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: Newton 
Answer:
 person: Newton