Complex sentence: Debt bondage was includes and defined as a form of slavery under the 1956 Supplementary Convention on Slavery, however, its many modern forms continue to include pawning, peonage, and worker debt.
Split into simpler sentences: Debt bondage was included and defined as a form of slavery under the 1956 Supplementary Convention on Slavery. However, its many modern forms continue to include pawning, peonage, and worker debt.