Complex sentence: On the far-western edge of the Shropshire Plain, nestling up against the foothills of the Welsh mountains, lies Oswestry School that since its foundation 600 years ago, in 1407, has taught generations of pupils in an unbroken sequence.
Split into simpler sentences: On the far-western edge of the Shropshire Plain, nestling up against the foothills of the Welsh mountains, lies Oswestry School. Since its foundation 600 years ago, in 1407, the school has taught generations of pupils in an unbroken sequence.