Complex sentence: This multiple originates from a complete sheet originally owned by Dr. Wonner, being later acquired by "Soto Hermanos" philatelic dealers who broke it up into several blocks in the 19th Century.
Split into simpler sentences: This multiple originates from a complete sheet originally owned by Dr. Wonner. The "Soto Hermanos" philatelic dealers broke it up into several blocks in the 19th Century.