Call type need to be either fire or medical, but source call type have multiple value.
Here we only identify either medical or fire type. 
 
 
 
 
 
Step 1. select all EMS type, change it to Medical

 
 
 
 
 
Step 1.1 use python, change it to Medical, 
warning: Python script use single quote as 'Medical'

 
 
 
Step 1.2 use VBscript, change it to Medical
warning: VBscript  use double quote as "Medical", single quote will give you error

 
 
 

 
 
 
 
 
 
 
 
Step 2.  switch select, the rest of call type will be change to fire
 
Step 2.1 use python, change it to fire, 
warning: Python script use single quote as 'fire'

 
 
 
 
 
Step 2.2 use Arcade, change it to fire, 
warning: Arcade use both single quote or double quoteas 'fire'
