## so they, when they...after they...they delivered ##

"they" refers to Judas, Silas, Paul and Barnabas

## were dismissed ##

" were given permission to leave" or "were sent away"

## down to Antioch ##

an elevation change. Also, away from Jerusalem, regardless of elevation in the final destination, was "down"

## they had read it, they rejoiced  ##

"they" refers here to the Gentile believers in Antioch.

## encouraged the brothers ##

"encouraged the believers at Antioch"

## also prophets ##

being a prophet carried authority from God in a special way. This may be translated as "because they were prophets" or "being prophets (UDB)"