Local configurational features with anywhere between min and max (grand)parents.
Example: (grandparent,parent:lhs:rhs)
For binary nodes only, adds binned metrics for: height of the subtree on the left, height of the subtree on the right, and difference in height between the subtrees on the left and right. Versions annotated with parent only and also with parent + 1 GP.
For binary nodes only, adds features (parent:lhs) and (parent:rhs).
Finds the string of letypes (augmented with _ and ^ start/stop markers), and then outputs ngrams on that string with n between min and max.
For each lexeme, finds the string of parent-names to root (augmented with _ and ^ start/stop markers), and then outputs ngrams on that string with n between min and max.
These ngrams are additionally "lexicalized" with the letype of the lexeme.
Adds a (virtual) feature for the sentence-final punctuation mark (which does nothing for discrimination),
and adds (real) conjunction features with that and every other pre-existing feature.