// (NP -LRB- __ -RRB-) --> (PRN -LRB- __ -RRB-)
tregex:    NP=np <1 -LRB- <3 -RRB-=rrb <- =rrb
operation: relabel np PRN

// LRB is not the first child of the parent
tregex:    -LRB-=lrb $+ (__=xx $+ -RRB-=rrb) !>1 __
operation: adjoinF (PRN @) lrb, move xx $- lrb, move rrb $- xx

// PRN is not the last child of the parent
tregex:    PRN=prn !>- __ $- NP=np
operation: adjoinF (NP @) np, move prn $- np

// If the ref NP has PP, find the right most NP
tregex:    PRN=prn $- (NP < PP <<- (NP=np !< PP))
operation: adjoinF (NP @) np, move prn $- np

// If the ref is VP, find the right most NP
tregex:    PRN=prn $- (VP <<- (NP=np !< PP))
operation: adjoinF (NP @) np, move prn $- np