Sentence:  One such condition can be formulated in terms of the "c-command" relation defined in (9) above: the relevant condition is given in (16) below:/ (16) C-COMMAND CONDITION ON ANAPHORS/ An anaphor must have an appropriate c-commanding <WSD>antecedent</WSD> 
Meaning of the word marked with <WSD> tags:  A word, phrase or clause referred to by a pronoun.