All polyadic predicates can be reduced to one dyadic predicate, interpretable as set membership. A primary distinction is drawn between predicative (also "predicate") and attributive expressions. But dependent types can express arbitrary propositions in predicate logic. Assertions are formulae in predicate logic. Adjunct clauses can also modify a nominal predicate. The clause predicate, which is often a content verb, demands certain arguments. RDF represents information using semantic triples, which comprise a subject, predicate, and object. Japanese adjectives are closely related to verbs (they can predicate a sentence, for instance). Parameters locally defined within the predicate are called "variables". It usually emphasizes the importance of grammatical divisions such as subject and predicate. Thus, some words add an additional parameter to the construction of an accurate truth predicate. Complements are often also arguments (expressions that help complete the meaning of a predicate). The causative morpheme allows an increase of valency of this predicate. Machine extraction creates a triple consisting of a subject, predicate or relation, and object. The phrase then functions as a single predicate.