Complex sentence: Lillington was formerly a village which existed before the time of the Domesday Book (1086), until it was subsumed into Leamington Spa, the parish being incorporated into that borough in 1890.
Split into simpler sentences: Lillington was formerly a village which existed before the time of the Domesday Book, 1086 until it was subsumed into Leamington Spa. The parish being incorporated into that borough in 1890.