NPP: ADVP? $NAP PP? PP?;
NAP: ADJ* N+;
NP: N;
PP: IN DT? NP;
ADVP: ADV ADJ;
^N[pos = NN, NNS, NNP, NNPS, VBG];
ADJ[pos = JJ, JJR, JJS, VBG, VBN];
ADV[pos = RB];
IN[pos = IN];
DT[pos = DT];
