Complex sentence: From 1893 until 1897 he worked at the Buitenzorg Botanical Garden on Java, and afterwards became an assistant at the Botanical Institute at the University of Munich, and beginning in 1898 he worked at the Botanical Museum in Hamburg.
Split into simpler sentences: From 1893 until 1897 he worked at the Buitenzorg Botanical Garden on Java, and afterwards became an assistant at the Botanical Institute at the University of Munich. Beginning in 1898 he worked at the Botanical Museum in Hamburg.