Here's why:
* "Soy" in Spanish can mean both "I am" and "soybean". In this context, it refers to the bean itself.
* "Negro" means "black" in Spanish.
However, "soy negro" could also refer to:
* Black soybeans: These are a variety of soybean with a dark, almost black, color. They are used in Asian cuisines, particularly in China and Japan.
* A specific type of black bean: Certain regions in Latin America may have a local variety of black bean known as "soy negro".
To understand the specific meaning of "soy negro", you would need more context. For example, knowing the context of a recipe or a conversation will help clarify what is being referred to.