Complex sentence: He first met Mavis Riley in 1976 but remained non-committal until 1984 when they agreed to marry-but on their wedding day, the indecisive couple jilted each other.
Split into simpler sentences: He first met Mavis Riley in 1976 but remained non-committal until 1984 when they agreed to marry. On their wedding day, the indecisive couple jilted each other.