Highlight duplicates - two sheets - based on two cell values

I have an excel which has 2 sheets. Need to highlight (the whole row) on the Target Group-sheet, information (criteria:street address, firsts & last name match) that is on "contacted-sheet".
As there is no key identifier, I thought if Street Address and Names could be criterias to be used for matching?

As a user I want to see on my marketing campaign target group, which of these persons have contacted.

I tired conditional formatting but for some reason it does not work (=Countif). Would appreciate any help.
Sample file enclosed.
Thanks!