Question needs rewording

Question needs rewording

Nous sommes professeurs.'' Who can be speaking? Alain and Georges,  Georges and Fiona,  Fiona and Judy, Fiona, Georges.  Why can't *Fiona* or *Georges* be speaking on their own? e.g Fiona is talking to a group of people about herself and another person. She says "Nous sommes professeurs". Likewise for Georges. The sentence does not require two people to be speaking simultaneously."