Translations of "Yesterday's boys" (Sticky grammar points) for Spanish

Original

The boys whom I saw yesterday were Karl and Jake

Translation

Translator

Los niños quienes vi ayer fueron Carlos y Jacob.
L-  o-s  niño-s  quien-es v-          i ayer      fueron        Carlos y   Jacob.
DEF-M-PL boy -PL whom -PL see-1.PST.PFV yesterday be.PST.PFV.PL Karl   and Jake.
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