1. A functional use-case generation system comprising: at least one hardware processor; a hardware implemented requirements and process context selector, executed by the at least one hardware processor, to determine whether a requirements context is available; in response to a determination that the requirements context is available, a hardware implemented requirements context analyzer, executed by the at least one hardware processor, to determine the requirements context as a task context and as a rule context for a requirements sentence of a requirements document, utilize the task context and the rule context to select a functional model from a plurality of functional models, wherein the functional models are based on entities, tasks, and rules, and utilize a hardware implemented process context analyzer, executed by the at least one hardware processor, to generate a functional use-case that includes an entity that is to perform a task based on a rule; and in response to a determination that the requirements context is not available, the hardware implemented process context analyzer is to select, based on process context, a functional model from the plurality of functional models that includes a process related to the process context, and utilize the functional model that includes the process related to the process context to generate the functional use-case.