Complex sentence: Cakemuir Castle is a mid- 16th century tower, built on the site of an earlier structure, named Black Castle Bell 1893, is oblong on plan and four storeys high with a parapet walk and garret above.
Split into simpler sentences: Cakemuir Castle is a mid- 16th century tower, built on the site of an earlier structure, named Black Castle. It is oblong on plan and four storeys high with a parapet walk and garret above.