Conversation so far:
where did the disciples sit at the last supper
At the last supper, Jesus was second from the left, John was to the right while Judas was to the left of Jesus, and Peter was across from John.
how many disciples were at the last supper
Only Jesus and His 12 disciples were at the last supper.
which apostle betrayed jesus
Judas Iscariot was one of the original Twelve Disciples of Jesus Christ. According to all four canonical gospels, Judas betrayed Jesus to the Sanhedrin in the Garden of Gethsemane.
what did judas do to betray jesus
Judas betrayed Jesus for a bribe of thirty pieces of silver by identifying him with a kiss to arresting soldiers of the High Priest Caiaphas.

Question: what is the high priest's role
Self-contained rewrite: what is high priest caiaphas's role in jesus' arrest