Complex sentence: In Australia, Microsoft originally partnered with Telstra in 1995 with MSN branded locally as'OnAustralia'; when Microsoft withdrew from the joint venture the following year, Telstra went on to assume 100% ownership and rebrand the service as BigPond.
Split into simpler sentences: In Australia, Microsoft originally partnered with Telstra in 1995 with MSN branded locally as'OnAustralia'. When Microsoft withdrew from the joint venture the following year, Telstra assumed 100% ownership and rebranded the service as BigPond.