Ios NSDictionary array - grouping values and keys

Ios NSDictionary array - grouping values and keys

I have the following result of NSDictionary Array
Bath = {
Keynsham = (
"nsham companies"
);
};
Bath = {
"Midsomer Norton" = (
"Keynsham companies"
);
};
Bath = {
"Norton Radstock" = (
"Keynsham taxi companies"
);
};
Birmingham = {
"Acock's Green" = (
"Acock's Green taxi companies"
);
};
Birmingham = {
"Alcester Lane's End" = (
"Alcester Lane's End taxi companies"
);
};
How can i combine the values and keys so that I end up with only one
category as shown below;
Bath = {
"Norton Radstock" = (
"Keynsham taxi companies"
);
"Midsomer Norton" = (
"Keynsham companies"
);
Keynsham = (
"nsham companies"
);
};
I am not sure if this is the best way to explain it