grammatical behavior of certain types of pronouns, and in particular their possible relationship with their antecedents, has been the focus of studies in binding, notably in the Chomskyan government and binding theory. In this binding context, reflexive and reciprocal pronouns in English (such as himself and each other) are referred to as anaphors (in a specialized restricted sense) rather than as pronominal elements. Under binding theory, specific principles apply to different sets of pronouns. In English, reflexive and reciprocal pronouns must adhere to Principle A: an anaphor (reflexive or reciprocal, such as "each other") must be bound in its governing category (roughly, the clause). Therefore, in syntactic structure it must be lower in structure (it must have an antecedent) and have a direct relationship with its referent. This is called a C-command relationship. For instance, we see that John cut himself is grammatical, but Himself cut John is not, despite having identical arguments, since himself, the reflexive, must be lower in structure to John, its referent. Additionally, we see examples like John said that Mary cut himself are not grammatical because there is an intermediary noun, Mary, that disallows the two referents from having a direct relationship. On the other hand, personal pronouns (such as him or them) must adhere to Principle B: a pronoun must be free (i.e., not bound) within its governing category (roughly, the clause). This means that although the pronouns can have a referent, they cannot have a direct relationship with the referent where the referent selects the pronoun. For instance, John said Mary cut him is grammatical because the two co-referents, John and him are separated structurally by Mary. This is why a sentence like John cut him where him refers to John is ungrammatical. Binding cross-linguistically The type of binding that applies to subsets of pronouns varies cross-linguistically. For instance, in German linguistics, pronouns can be split into two distinct categories — personal pronouns and d-pronouns. Although personal pronouns act identically to English personal pronouns (i.e. follow Principle B), d-pronouns follow yet another principle, Principle C, and function similarly to nouns in that they cannot have a direct relationship to an antecedent. Antecedents The following sentences give examples of particular types of pronouns used with antecedents: Third-person personal pronouns: That poor man looks as if he needs a new coat. (the noun phrase that poor man is the antecedent of he) Julia arrived yesterday.