sentence1: She married twice , first in 1749 with Prince Antoni Lubomirski and the second time with Prince Kasimierz Poniatowski on January 21 , 1751 .
sentence2: She married twice , the first time in 1749 with the Prince Kazimierz Poniatowski , the second time with the Prince Antoni Lubomirski on the 21 January 1751 .