Quantifiers that enforce dual agreement (i.e., as with the numeral "2"). Some feminine and neuter body parts in Czech have preserved dual forms, and if the noun is dual, so are its attributes (adjectives, pronouns). So the agreement of the numeral 2 differs formally from 3-4 (Ivan A. Derzhanski, email 2010/06/16, http://purl.org/olia/mte/multext-east.owl#DualQuantifier) Numeral/Class="definite", Numeral/Class="definite1", Numeral/Class="definite234" etc. refer to specific patterns of congruency with Slavic numerals that originate from the difference between Old Slavic singular (definite1), dual (definite2, definite234) and plural (definite). (http://purl.org/olia/mte/multext-east.owl#DualQuantifier)