sentences:  Furthermore, each of these three components is typically "explicitly" represented somewhere within the memory of the PRS agent at runtime, which is in contrast to purely reactive systems, such as the subsumption architecture.The PRS concept was developed by the Artificial Intelligence Center at SRI International during the 1980s, by many workers including Michael Georgeff, Amy L. Lansky, and François Félix Ingrand.Their framework was responsible for exploiting and popularizing the BDI model in software for control of an intelligent agent.