when does common era begin
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when does common era begin
when did the common era begin
what year did the common era begin
when is the common era said to begin
beginning of the common era
what marked the beginning of the common era
what marks the beginning of the common era
when does common era begin, when did the common era begin, what year did the common era begin, when is the common era said to begin, beginning of the common era, what marked the beginning of the common era, what marks the beginning of the common era