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The problems from Figure 5 are eliminated here. Lactams has been removed and two new concepts, Inorganic Sulfur Compounds and Organic Sulfur Compounds, are introduced. A new IS-A link from Beta-Lactams to Organic Sulfur Compounds is added. This avoids the wrong conclusion that Beta-Lactams is an Inorganic Chemical. The location of Ertapenem in the hierarchy has also been corrected.
