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Table 1: 
Results for the MTNT test sets. Tagged back-translation systems (TBT) were trained on back-translations of News Crawl or Reddit monolingual data. “+” indicates that the generated data were concatenated to the original PL1-L2 parallel data. “FT” denotes the fine-tuning of the vanilla NMT system. “*” denotes systems significantly better than the vanilla NMT system with a p-value < 0.05.
SystemBLEUchrF
fr→senen→frja→enen→ja
vanilla 21.6 21.7 8.1 0.174 
 
+ TBT News 25.8* 25.3* 8.6* 0.190* 
+ TBT Reddit 22.9* 25.5* 0.5 0.181* 
 
FT on SNI 23.1* 22.3* 8.2* 0.164 
+ SNI 22.0 21.7 8.3* 0.158 
 
FT on NGBT 0.2 17.3 0.5 0.021 
SystemBLEUchrF
fr→senen→frja→enen→ja
vanilla 21.6 21.7 8.1 0.174 
 
+ TBT News 25.8* 25.3* 8.6* 0.190* 
+ TBT Reddit 22.9* 25.5* 0.5 0.181* 
 
FT on SNI 23.1* 22.3* 8.2* 0.164 
+ SNI 22.0 21.7 8.3* 0.158 
 
FT on NGBT 0.2 17.3 0.5 0.021 
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