100% of AFD employees who respond on either an ambulance or fire engine are EMT trained (or higher) AND firefighter trained. Furthermore, any 911 call in the city requesting medical aid results in AFD units being dispatched.

You ask why 2 people cannot handle a call for a person not breathing: this requires rapid treatment or they will literally die. This is not an uncommon situation in EMS. This requires at least one person to breathe for the individual, another to start an IV to deliver medications, another to gather medical history and information to help better understand how to treat this person, someone to coordinate getting the person out of the building/into the ambulance, and someone to oversee the operation. This is AT LEAST a 5-person job, and that's for a call without unforeseen complications (like an obese patient who is difficult to move).