Explanation:

BDM2 is a contact of interest for # both the London Office and Toronto Office opportunities.
BDM2 is a sales team member for all Northwind Traders opportunities, meaning they are involved in both the London Office and Toronto Office opportunities.
BDM3 is a contact of interest for # the Toronto Office opportunity.
BDM3 owns all Northwind Traders opportunities except those owned by BDM1. Since BDM1 owns the London Office opportunity, BDM3 is only involved in the Toronto Office opportunity.
Client Contact2 is a contact of interest for # the Toronto Office opportunity.
The Toronto Office opportunity lists Client Contact2 as the primary contact, making them a contact of interest for that opportunity.
Client Contact1 is a contact of interest for # the London Office opportunity.
The London Office opportunity lists Client Contact1 as the primary contact, making them a contact of interest for that opportunity.