I am interested in creating an ontology which will model arguments (among other things). For example, a triple in the ontology might be
Vaccination -> can lead to -> Autism
(not that I necessarily believe this, just a good example of an argument). I would like to attach sources to any disputed statement. So ideally, the above example would be stored as
Vaccination -> can lead to -> Autism -> according to -> Article X
This cannot easily be represented as a triple in a standard ontology. What are the accepted ways of modeling this type of data?
I see that on WikiData, all relations can have sources attached to them (e.g. see https://www.wikidata.org/wiki/Q23 for sources on when George Washington was born). It could be that WikiData doesn't store their data as triples.