143216
The campaign registered young people to vote once the voting age was lowered to 18 years old in 1971 with the adoption of the 26th Amendment to the U.S. Constitution .
 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