1754
The arrival of the electron at the positive contact and the hole at the negative contact produces the electrical signal that is sent to the preamplifier , the MCA , and on through the system for analysis .
 location: MCA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: MCA