topic: grammar induction

[milahu]

this belongs to
https://github.com/topics/grammar-induction

see also
https://datascience.stackexchange.com/questions/78377/learn-common-grammar-pattern-from-set-of-sample-strings
https://en.wikipedia.org/wiki/Grammar_induction

im doing research for
https://github.com/milahu/reverse-template-engine
to find patterns in parse trees