get duplicate rule specify in crm plugin

hi,

I'm creating 2 duplicate rule for contact in CRM 2011.
1 - duplicate rule for number phone 
2 - duplicate rule for email
i create plugin on create or update contact i need to get name the rule detected
for example :
contact 1 : full_name = Philip Richardson ; email = prichardson4@usnews.com;
contact 2 : full_name = Diana Jackson ; email = prichardson4@usnews.com;
conatct 1 already exists and contact 2 new contact created
duplicate rule detected 2 for the same email
i need to get name the rule detected in the plugin

Any ideas ?
thanks.