Complex sentence: The usage of the infinity symbol as a representation of autism, started by Aspies For Freedom in June 2004, was a reaction to the negative connotations associated with the jigsaw symbol commonly used by parents to represent autism.
Split into simpler sentences: The usage of the infinity symbol as a representation of autism, started by Aspies For Freedom in June 2004. It was a reaction to the negative connotations associated with the jigsaw symbol commonly used by parents to represent autism.