No decision tree to display

Example items (sample of 7)

sen_str	Verb_form	Verb_features	nsubj_form	nsubj_features	treebank_link
'A uaglionă scrivettĕ 'na lettĕră ’a la amica sojă .	scrivettĕ	features... upos=VERB deprel=root lemma=scrivĕ Mood=Ind Person=3 Tense=Past VerbForm=Fin	uaglionă	features... upos=NOUN lemma=uaglionă Gender=Fem Number=Sing Person=3 deprel=nsubj	UD_Neapolitan-RB
Essă facettĕ lavà 'a machină a 'o maritŏ suojŏ .	facettĕ	features... upos=VERB deprel=root lemma=fà Mood=Ind Person=3 Tense=Past VerbForm=Fin	essă	features... upos=PRON lemma=essă Gender=Fem Number=Sing Person=3 PronType=Prs deprel=nsubj	UD_Neapolitan-RB
Nun cĕ so riuscitŏ a stà arretĕ pĕcché issŏ currevĕ assajĕ velocĕ .	currevĕ	features... upos=VERB deprel=advcl lemma=corrĕ Mood=Ind Person=3 Tense=Imp VerbForm=Fin	issŏ	features... upos=PRON lemma=issŏ Gender=Masc Number=Sing Person=3 PronType=Prs deprel=nsubj	UD_Neapolitan-RB
'O vicinŏ 'e casă 'e Pietrŏ pittajĕ 'o sticcatŏ 'e russŏ .	pittajĕ	features... upos=VERB deprel=root lemma=pittà Mood=Ind Person=3 Tense=Past VerbForm=Fin	vicinŏ	features... upos=NOUN lemma=vicinŏ Gender=Masc Number=Sing Person=3 deprel=nsubj	UD_Neapolitan-RB
Issŏ accattajĕ 'na machină ma 'o fratĕ sulamentĕ 'na biciclettă .	accattajĕ	features... upos=VERB deprel=root lemma=accattà Mood=Ind Person=3 Tense=Past VerbForm=Fin	issŏ	features... upos=PRON lemma=issŏ Gender=Masc Number=Sing Person=3 PronType=Prs deprel=nsubj	UD_Neapolitan-RB
Mariă vincettĕ 'o bbrunzŏ , Pietrŏ l' argientŏ e Giuvanna l' orŏ .	vincettĕ	features... upos=VERB deprel=root lemma=vincĕ Mood=Ind Person=3 Tense=Past VerbForm=Fin	Mariă	features... upos=PROPN lemma=Mariă Gender=Fem Number=Sing Person=3 deprel=nsubj	UD_Neapolitan-RB
Essă criscettĕ a Ppariggĕ , 'a capitalĕ francesĕ .	criscettĕ	features... upos=VERB deprel=root lemma=créscĕ Mood=Ind Person=3 Tense=Past VerbForm=Fin	essă	features... upos=PRON lemma=essă Gender=Fem Number=Sing Person=3 PronType=Prs deprel=nsubj	UD_Neapolitan-RB

Single label

Example items (sample of 7)