Complex sentence: Shewalton Collieries 5 and 6 opened in 1933 and closed in 1950 with a workforce of around 150, mining house coal, which was also taken to the Montgomeryfield screening plant and washer.
Split into simpler sentences: Shewalton Collieries 5 and 6 opened in 1933 and closed in 1950. The workforce was around 150, mining house coal which was also taken to the Montgomeryfield screening plant and washer.