When processing "not only" and similar phrases into UD, separate them from the CONJP (sometimes ADVP by error) that they show up in. This allows the later part of the converter to connect both of them to the parent with advmod.

As part of this, turn the UPOS of "not" into PART

Also, update the corrector to make a few changes to the structure, which may help usages of the trees or of SD as well as the UD.  The UD changes are written to accommodate the structural errors in the original PTB, though

Author: AngledLuffa

src/edu/stanford/nlp/trees/CoordinationTransformer.java

@@ -728,6 +728,10 @@ private static Tree findCCparent(Tree t, Tree root) {
   private static final TregexPattern BUT_ALSO_PATTERN = TregexPattern.compile("CONJP=conjp < (CC=cc < but) < (RB=rb < also) ?$+ (__=nextNode < (__ < __))");
   private static final TsurgeonPattern BUT_ALSO_OPERATION = Tsurgeon.parseOperation("[move cc $- conjp] [move rb $- cc] [if exists nextNode move rb >1 nextNode] [createSubtree ADVP rb] [delete conjp]");
 
+  /* "not only" is not a MWE, so break up the CONJP similar to "but also". */
+  private static final TregexPattern NOT_ONLY_PATTERN = TregexPattern.compile("CONJP|ADVP=conjp < (RB=not < /^(?i)not$/) < (RB=only < /^(?i)only|just|merely|even$/) ?$+ (__=nextNode < (__ < __))");
+  private static final TsurgeonPattern NOT_ONLY_OPERATION = Tsurgeon.parseOperation("[move not $- conjp] [move only $- not] [if exists nextNode move only >1 nextNode] [if exists nextNode move not >1 nextNode] [createSubtree ADVP not] [createSubtree ADVP only] [delete conjp]");
+
   /* at least / at most / at best / at worst / ... should be treated as if "at"
      was a preposition and the RBS was a noun. Assumes that the MWE "at least"
      has already been extracted. */
@@ -749,6 +753,7 @@ public static Tree MWETransform(Tree t) {
 
     Tsurgeon.processPattern(ACCORDING_TO_PATTERN, ACCORDING_TO_OPERATION, t);
     Tsurgeon.processPattern(BUT_ALSO_PATTERN, BUT_ALSO_OPERATION, t);
+    Tsurgeon.processPattern(NOT_ONLY_PATTERN, NOT_ONLY_OPERATION, t);
     Tsurgeon.processPattern(AT_RBS_PATTERN, AT_RBS_OPERATION, t);
     Tsurgeon.processPattern(AT_ALL_PATTERN, AT_ALL_OPERATION, t);
 

src/edu/stanford/nlp/trees/UniversalEnglishGrammaticalRelations.java

@@ -1312,7 +1312,6 @@ private UniversalEnglishGrammaticalRelations() {}
         MODIFIER,
         "S|VP|ADJP|PP|ADVP|UCP(?:-TMP|-ADV)?|NX|NML|SBAR|NP(?:-TMP|-ADV)?", tregexCompiler,
             "NP|NP-TMP|NP-ADV|NX|NML < (PDT|CC|DT=target < /^(?i:either|neither|both)$/ $++ CC)",
-            "NP|NP-TMP|NP-ADV|NX|NML < (CONJP=target < (RB < /^(?i:not)$/) < (RB|JJ < /^(?i:only|merely|just)$/) $++ CC|CONJP)",
             // This matches weird/wrong NP-internal preconjuncts where you get (NP PDT (NP NP CC NP)) or similar
             "NP|NP-TMP|NP-ADV|NX|NML < (PDT|CC|DT=target < /^(?i:either|neither|both)$/ ) < (NP < CC)",
             "/^S|VP|ADJP|PP|ADVP|UCP(?:-TMP|-ADV)?|NX|NML|SBAR$/ < (PDT|DT|CC=target < /^(?i:either|neither|both)$/ $++ CC)",

src/edu/stanford/nlp/trees/UniversalPOSMapper.java

@@ -134,6 +134,9 @@ public static void load() {
       // RB -> PART when it is verbal negation (not or its reductions)
       { "@VP|SINV|SQ|FRAG|ADVP < (RB=target < /^(?i:not|n't|nt|t|n)$/)", "PART" },
 
+      // "not" as part of a phrase such as "not only", "not just", etc is tagged as PART in UD
+      { "@ADVP|CONJP <1 (RB=target < /^(?i:not|n't|nt|t|n)$/) <2 (__ < only|just|merely|even) !<3 __", "PART" },
+
       // Otherwise RB -> ADV
       { "RB=target <... {/.*/}", "ADV" },
 

src/edu/stanford/nlp/trees/treebank/EnglishPTBTreebankCorrector.java

@@ -168,6 +168,16 @@ private static BufferedReader getBufferedReader(String source) {
     "adjoin (NP NN@) newnp\n" +
             '\n') +
 
+    // Fix not_RB only_JJ, which should generally be not_RB only_RB
+    // and put it under a CONJP instead of an ADVP
+    ("ADVP|CONJP <1 (__ < /^(?i:not)$/) <2 (JJ=bad < only|just|merely|even) !<3 __\n" +
+     "relabel bad RB\n" +
+     '\n') +
+
+    ("ADVP=bad <1 (__ < /^(?i:not)$/) <2 (RB < only|just|merely|even) !<3 __\n" +
+     "relabel bad CONJP\n" +
+     '\n') +
+
     // Fix some cases of 'as well as' not made into a CONJP unit
     // There are a few other weird cases that should also be reviewed with the tregex
     // well|Well|WELL , as|AS|As . as|AS|As !>(__ > @CONJP)