The document discusses the gender of nouns in Russian. It notes that unlike in English, all Russian nouns are designated as either masculine, feminine or neuter. The gender is typically determined by the noun's ending, with different endings usually corresponding to different genders. There are some exceptions, such as nouns referring to people where the gender is clear. Nouns ending in - can be either masculine or feminine. The document provides tables of examples to illustrate the rules and exceptions.