PropBank is a resource that provides a corpus of texts annotated with information about basic semantic propositions. It links verbs to their roles and arguments, helping to clarify how different words relate to each other in sentences. This makes it easier for computers to understand human language. The annotations in PropBank are based on the Penn Treebank, which is a collection of syntactically annotated texts. By providing a structured way to analyze verb meanings and their associated roles, PropBank is widely used in natural language processing tasks, such as machine translation and information extraction.