Complex sentence: Dimension shampoo was a heavily perfumed shampoo product, produced in the early 1980s by the personal products division of Lever Brothers, and marketed by Ogilvy.
Split into simpler sentences: Dimension shampoo was a heavily perfumed shampoo product, which wasproduced in the early 1980s. This was by the personal products division of Lever Brothers, and marketed by Ogilvy.