Complex sentence: He attended Guisborough Grammar School and gave his first commentary-on a point-to-point meeting-at the age of 15, and his broadcasting career began at the age of 18 on local radio.
Split into simpler sentences: He attended Guisborough Grammar School and gave his first commentary-on a point-to-point meeting-at the age of 15. His broadcasting career began at the age of 18 on local radio.