ISB ~ John 20 v2

out of the tomb:The empty tomb is the indisputable fact of Easter morning, as testified to even by the Roman soldiers who guarded the site (Mt 28:11-15). The disappearance of Jesus is the first indication that he has risen as he said (Mt 20:17-19). This is confirmed by several appearances throughout the next 40 days (Jn 20:19-21:1; Acts 1:3; CCC 640).

we do not know:Presumes that Mary has come to the tomb with other women, as in Mt 28:1, Mk 16:1, and Lk 23:55-24:1.