dcg - how to define (sometimes) recursive prolog trees -

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i've got 2 different types of sentences parse, i'll give them simples names now. basically, have 2 parse trees

1. --> , pp  --> dv, np  2. --> tv, np

i hope makes sense, have no idea how program in prolog without getting lots of loops! great, please let me know if can provide more information (first time using stack overflow)


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