Semantic Web (SW) rule languages, such as Notation3 (N3), add declarative programming abilities to the SW platform. To execute rule-based programs, instead of building complex abstract machines, an option is to translate the program into an imperative language; in that case, the latter’s compiler or interpreter can simply be used to execute the program. We propose a challenge to implement top-down reasoners by pre-compiling rules into a modern imperative language. The features of these languages, e.g., functions as first-class citizens and co-routining, and their extensive libraries, can simplify such a translation. Tackling this challenge can yield development simplicity, compared to typical abstract machine implementations; and integrated logic and imperative environments, as translated code can be directly called from other imperative code. We propose one solution to this challenge, called fun3, which pre-compiles N3 rules into Python functions. We provide initial performance results that show the feasibility of solving this challenge while not overly sacrificing performance.