stratum,n,correct_pct,excerpt_alone_pct,in_context_pct,single_pct,capability_pct,no_marketing_pct
added,30,96.7,36.7,96.7,100.0,100.0,96.7
confirmed,90,97.8,63.3,100.0,95.6,98.9,100.0
corrected,30,86.7,50.0,93.3,96.7,96.7,100.0