Format parse tree as JSON
Format parse tree as JSON

cucapra/braid,guoyiteng/braid,guoyiteng/braid,cucapra/braid,guoyiteng/braid,cucapra/braid,guoyiteng/braid,guoyiteng/braid,guoyiteng/braid,cucapra/braid,cucapra/braid,cucapra/braid