This tool inputs a custom probabilistic context-free grammar (PCFG) and computes information-theoretic metrics (e.g. suprisal) within a sentence. Originally crafted to support projects such as (Cho & Lewis, 2019).
See PCFG_Simulator_Tutorial.ipynb for more details. Currently the tool does
not handle grammars with mutual recursion and there is an issue with calculating
the KL divergence.