The input dataset has a long sentence (only 1 sentence is given in all inputs). You have the following grammar rules:
S -> Clause Conj Clause Stop
Clause -> NP Adv VP
NP -> Noun
VP -> Verb | VP Adj | VP Adj Adv
Adv -> 'usually' | 'very' | 'sometimes'
Pronoun -> 'he'
Verb -> 'is' | 'be'
Modal -> 'can'
Adj -> 'diplomatic' | 'unkind'
Conj -> 'but'
Comma -> ','
Stop -> '.'However, this grammar has bugs. Find the bugs and fix them. Please, do not edit names for elements.
In the end, you need to get the following tree:
Provide a standard NLTK printed output as the answer.
