Complex sentence: Blantyre Celtic were a former football team that played under the auspices of the Scottish Junior Football Association; their home ground was near Springwell in Blantyre and the had local rivals Blantyre Victoria F.C., known locally as the Vics.
Split into simpler sentences: Blantyre Celtic were a former football team that played under the auspices of the Scottish Junior Football Association. Their home ground was near Springwell in Blantyre and they had as local rivals Blantyre Victoria F.C., known locally as the Vics.