sentence1: these results were corroborated by lembersky et al , 2012a lembersky et al , 2013 , who further demonstrated that translation models can be adapted to translationese , thereby improving the quality of smt even further .
sentence2: these results were corroborated by lembersky et al , 2012a lembersky et al , 2013 , who showed that translation models can be adapted to translationese , thereby improving the quality of smt even further .