// FIXME: print the input region that was ambiguously matched
StringBuffer sb = new StringBuffer();
sb.append("unresolved ambiguity at "+ambiguity.getRegion()+"; shared subtrees are shown as \"*\" ");
+ //sb.append("\noffending text: ");
for(Tree<?> result : ht) {
sb.append("\n possibility: ");
StringBuffer sb2 = new StringBuffer();