an Entity references as follows:
The Hammond organ is an electric organ invented by Laurens Hammond and John M. Hanert. The instrument was first manufactured in 1935. It has two manuals along with a set of bass pedals. A variety of models have been produced. The most popular is the B-3, produced between 1954 and 1974.(This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.)