class_docstr: conll2003 data class for seqlabel task.
class_docstr_tok: ["conll2003","data","class","for","seqlabel","task","."]
code: def test_build(self):
      conll_2003 = Conll2003("conll_2003")
      conll_2003.build()
      self.assertTrue(conll_2003.is_ready())
  
imports: from absl import logging
  import delta.compat
  from delta.data.datasets.conll_2003 import Conll2003
label_desc: Use image node_id 1 for calling the Conll2003Test obj's underlying member method code with example usage: obj.test_build() without return types