>>629
GNU awk 4.0.0 以降で

$ gawk -ijoin -vFPAT='"[^"]+"' '{
for(i=1;i<=NF;i+=3){
item[$i]=1
row[NR,$i]=$(i+2)
}
}END{
for(i in item){x[n++]=i}
n--
print join(x,0,n,",")
for(i=1;i<=NR;i++){
k=0
for(j in x){
r[k++]=row[i,x[j]]
}
print join(r,0,n,",")
}
}' data.jsonl