code: def denoise_v1_m50():
      """More masking during training."""
      hparams = denoise_v1_m15()
      hparams.noising_spec_train = {"type": "mask", "prob": 0.5}
      return hparams
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.models import mtf_transformer
  from tensor2tensor.models import mtf_transformer2
  from tensor2tensor.models.research import moe
  from tensor2tensor.utils import registry
label_desc: Use image node_id 37 for calling a global function with example usage: denoise_v1_m50() and returns: hparams