Complex sentence: The Dreher brewery, named after Anton Dreher (creator of the Vienna lager style) who started a brewery in Budapest in 1862, came to dominate the Hungarian market before the Second World War.
Split into simpler sentences: The Dreher brewery is named after Anton Dreher, the creator of the Vienna lager style. He created the brewery in Budapest in 1862 and it came to dominate the Hungarian market before the Second World War.