text: _base_ = [
      '../_base_/models/upernet_r50.py',
      '../_base_/datasets/pascal_voc12_aug.py', '../_base_/default_runtime.py',
      '../_base_/schedules/schedule_40k.py'
  ]
  model = dict(
      decode_head=dict(num_classes=21), auxiliary_head=dict(num_classes=21))
  