(1) anna is a woman

SENTENCE_NT'anna is a woman'
    VERB_NT'is' {verb 'be' 3p s act IS_TENSE +ve}
    PROPER_NOUN_NT'anna' {proper nom/acc f s}
    COMMON_NOUN_NT'woman' {indefinite 'a' n/m/f nom/acc s} {common nom/acc f s}

(2) anna is not charles

SENTENCE_NT'anna is not charles'
    VERB_NT'is not' {verb 'be' 3p s act IS_TENSE -ve}
    PROPER_NOUN_NT'anna' {proper nom/acc f s}
    PROPER_NOUN_NT'charles' {proper nom/acc m s}