Data Scope Model beam lenpan Abstract BART 6 1.0 "" BART_XSUM 2 0.8 "" CATTS 2 0.4 "" CATTS_XSUM 4 0.2 AIC BART 2 0.2 "" BART_XSUM 5 0.8 "" CATTS 4 0.4 "" CATTS_XSUM 2 0.2