Simplify the following text for a Grade 13 native English-speaking person.
Original: There is some evidence that caid was taken around the world by the Irish diaspora , and some historians argue that it may have also played some part in the origins of Australian rules football , although such a relationship is controversial and the subject of debate .
Simplified: There is some evidence that caid was taken around the world by the Irish diaspora , and that it may have influenced the development of Australian rules football , although this is controversial .