Update scripts/process.py

scripts/process.py

@@ -9,6 +9,7 @@ from haystack.pipelines import ExtractiveQAPipeline
 from haystack.nodes import FARMReader, TfidfRetriever
 from haystack.nodes.file_converter import PDFToTextConverter, TextConverter
 from haystack.schema import Document
+from haystack.nodes import PreProcessor
 import logging
 from markdown import markdown
 from annotated_text import annotation