; Grab and store the data from raw 333 when you join the channel
raw 333:*:{
set -e $+(%,topic.,$cid,$2) [Set by $3 : $gmt($4) GMT]
}
; (Re-)Set the variable when topic is changed
on *:TOPIC:#:{
set -e $+(%,topic.,$cid,#) [Set by $nick : $gmt($ctime) GMT]
}