fix bigbio imports

verspoor_2013.py

@@ -35,6 +35,8 @@ import datasets
 from .bigbiohub import kb_features
 from .bigbiohub import BigBioConfig
 from .bigbiohub import Tasks
+from .bigbiohub import parse_brat_file
+from .bigbiohub import brat_parse_to_bigbio_kb
 
 _LANGUAGES = ['English']
 _PUBMED = True
@@ -250,15 +252,15 @@ class Verspoor2013Dataset(datasets.GeneratorBasedBuilder):
         if self.config.schema == "source":
             txt_files = data_files["text_files"]
             for guid, txt_file in enumerate(txt_files):
-                example = parsing.parse_brat_file(txt_file)
+                example = parse_brat_file(txt_file)
                 example["id"] = str(guid)
                 yield guid, example
 
         elif self.config.schema == "bigbio_kb":
             txt_files = data_files["text_files"]
             for guid, txt_file in enumerate(txt_files):
-                example = parsing.brat_parse_to_bigbio_kb(
-                    parsing.parse_brat_file(txt_file)
+                example = brat_parse_to_bigbio_kb(
+                    parse_brat_file(txt_file)
                 )
                 example["id"] = str(guid)
                 yield guid, example