Describe the bug
When creating an interrogative type question, the verb does not pick the correct form.

To Reproduce
Steps to reproduce the behavior:

Lexicon lexicon = new XMLLexicon();
NLGFactory nlg = new NLGFactory(lexicon);
Realiser realiser = new Realiser();
SPhraseSpec clause = nlg.createClause("you", "think");
PPPhraseSpec aboutJohn = nlg.createPrepositionPhrase("about", "John");
clause.addPostModifier(aboutJohn);
clause.setFeature(Feature.INTERROGATIVE_TYPE,InterrogativeType.WHAT_OBJECT);
String realisation = realiser.realiseSentence(clause);

The result is:

What does you think about John?

Expected behavior
The result should be:

What do you think about John?

Screenshots
If applicable, add screenshots to help explain your problem.

Java version
Tested with JDK 8 and 13.

Additional context
It seems that in the original SimpleNLG there is a test in which it selects the appropriate verb. See the method testWhatObjectInterrogative() at line 814. The same goes for a Dutch sentence, configured like this:

Lexicon lexicon = new simplenlg.lexicon.dutch.XMLLexicon();
NLGFactory nlg = new NLGFactory(lexicon);
Realiser realiser = new Realiser();

SPhraseSpec phrase = nlg.createClause();
NPPhraseSpec subject = nlg.createNounPhrase("Jij");
subject.setFeature(Feature.PRONOMINAL, true);
subject.setFeature(Feature.PERSON, Person.SECOND);
phrase.setSubject(subject);
phrase.setVerb("doen");
phrase.setObject("dat");
phrase.setFeature(Feature.INTERROGATIVE_TYPE, InterrogativeType.WHY);
phrase.setFeature(Feature.TENSE, Tense.PRESENT);
String result = realiser.realiseSentence(phrase);

The result: Waarom doet jij dat?, the expected result is Waarom doe jij dat?

For the What do you think about John? sentence, the contents of the realization:

SimpleNLG NL:
{realisation=null, category=SENTENCE, features={interrogative=true, textComponents=[InflectedWordElement[what:NOUN], [InflectedWordElement[do:VERB]], [InflectedWordElement[you:PRONOUN]], [InflectedWordElement[think:VERB], [[InflectedWordElement[about:PREPOSITION], [InflectedWordElement[John:ANY]]]]]]}}

Debug: link

Original
{realisation=null, category=SENTENCE, features={interrogative=true, textComponents=[InflectedWordElement[what:PRONOUN], InflectedWordElement[do:VERB], InflectedWordElement[you:PRONOUN], [InflectedWordElement[think:VERB], [[InflectedWordElement[about:PREPOSITION], InflectedWordElement[John:ANY]]]]]}}

Debug: link

It could have to do with that What is a pronoun in the one case, and a noun in the other case?

Describe the bug
When formulating an interrogative type and adding a postmodifier, this will not be added to the end of the sentence

To Reproduce
Steps to reproduce the behavior:

final private static Lexicon lexicon_nl = new simplenlg.lexicon.dutch.XMLLexicon();
final private static NLGFactory factory_nl = new NLGFactory(lexicon_nl);
final private static Realiser realiser_nl = new Realiser();

SPhraseSpec clause3 = factory_nl.createClause();
NPPhraseSpec subject = factory_nl.createNounPhrase("JIJ");
PPPhraseSpec aboutJan = factory_nl.createPrepositionPhrase("over","Jan");
subject.setFeature(Feature.PRONOMINAL, true);
subject.setFeature(Feature.PERSON, Person.SECOND);
clause3.setSubject(subject);
clause3.setVerb("denk");
clause3.addPostModifier(aboutJan);
clause3.setFeature(Feature.INTERROGATIVE_TYPE, InterrogativeType.WHAT_OBJECT);
String output3 = realiser_nl.realiseSentence(clause3);
System.out.println(output3);	

Expected behavior
I added a fix for taking the right morphology for question types for Person.SECOND, so the verb is denkt most likely in other cases, though in the debug output, also the inflection might differ.

The expected output:
Wat denk jij over Jan?

The actual output:
Wat denk over Jan jij?

Java version
JDK 8 and JDK 13

Additional context
Debug output: link