 The method was not able to utilize the available huge amount of  monolingual data because of the inability of  models to differentiate between the authentic and synthetic parallel data  .
<clarity>  The method was not able to utilize the available huge amount of  monolingual data because of the inability of  models to differentiate between the authentic and synthetic parallel data  .
 The method was not able to utilize the available huge amount of monolingual data because of the inability of models to differentiate between the authentic and synthetic parallel data during training .