an Entity references as follows:
The Reciprocal Guarantee of Two Nations (Polish: Zaręczenie Wzajemne Obojga Narodów; also Reciprocal Warranty of Two Nations, Mutual Pledge of the Two Nations, and Mutual Assurance of the Two Nations was an addendum, adopted on 20 October 1791 by the Great Sejm, to the Polish-Lithuanian Constitution of 3 May 1791.