59173
The overall cooling process is workable , but highly inefficient ; approximately 25 " million antiprotons leave the Antiproton Decelerator and roughly 25,000 make it to the Penning–Malmberg trap , which is about or 0.1 % of the original amount .
 location: Penning–Malmberg
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: Penning–Malmberg 
Answer:
 location: Penning–Malmberg