Complex sentence: Jean Anastasi won the 218 km long stage 5 of the 1961 edition of Paris-Nice between St Etienne and Avignon at an average speed of 44.917 km per hour, however the record was not recognised because of claims that the course had not been properly measured.
Split into simpler sentences: Jean Anastasi won a 218km stage of the 1961 Paris-Nice between St Etienne and Avignon at 44.917kmh. The record was not recognised because the course had not been properly measured.