2891
It had many changes throughout its production run , the most notable being the horn changed to fiberglass around 1968 , then to a larger design , as seen in the video .
 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