Complex sentence: On 30 March 1985 Soering drove alone to the Haysom residence where he dined with the unsuspecting couple; during or after dinner he picked a quarrel with them before attacking them viciously with a knife.
Split into simpler sentences: On 30 March 1985 Soering drove alone to the Haysom residence and dined with the unsuspecting couple. During or after dinner he picked a quarrel with them before attacking them viciously with a knife.