Someone in his team

He didn't know if someone in his team had taken care of psychiatric patients.

Can't that sentence mean two things:

a) He didn't know if there was someone in his team had taken care of psychiatric patients. He didn't know if anyone in his group had someone taken care of psychiatric patients.

b) He didn't know if a specific person in his team had taken care of psychiatric patients. Maybe he knew that there were others in his team who had taken care of psychiatric patients.