manifulate the Penn Treebank format
This class knows how to read two treebank formats, the Penn format and
the Chomsky Normal Form (CNF) format. These formats differ in how they
handle terminal nodes. The Penn format places pre-terminal part of
speech tags in the left-hand position of a parenthesis-delimited pair,
just like it does non-terminal nodes.

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: http://search.cpan.org/dist/Lingua-Treebank/
