code: def gelu(x):
      return (
          0.5
          * x
          * (
              1
              + torch.tanh(
                  math.sqrt(2 / math.pi)
                  * (x + 0.044715 * torch.pow(x, 3))
              )
          )
      )
  
imports: from __future__ import with_statement
  from __future__ import division
  from __future__ import absolute_import
  import copy
  import io
  import json
  import logging
  import math
  import re
  import tarfile
  import numpy
  import torch
  from torch.nn import Parameter
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.file_utils import cached_path
  from allennlp.common.from_params import FromParams
  from io import open
label_desc: Use image node_id 1 for calling a global function with example usage: gelu(x) and returns: unknown