(By Jeremy Collins and Jay Latarche): "Is there a copula in use in an equative sentence when the predicate is a nominal? The copula must be expressed in at least some equative sentences with predicate nominals but need not be obligatory in these constructions. Both verbal copulas and pro-copulas (e.g. demonstratives or personal pronouns that link the subject and predicate nominals) are relevant for this feature. Please note that adjectives are not included within the category of ‘nominals’ here. Please note copulas may be free forms, affixes, or clitics.