2 Topic linked to 1 subtopic

Mind map is like a tree, so you start from one idea and you can link it with 2 or more, but… not always.

Imagine this you have the Topic "Animal" then you make 2 subtopic "Cat" and "Dog" but now you wanna make a third sub topic that includes both "Pet".

The only way you can do it is making 2 third subtopic with the same content "pet", it could be nice if you can link "dog" and "cat" subtopic both to a third subtopic "pet".