Update app.py

app.py

@@ -62,7 +62,8 @@ document_store = InMemoryDocumentStore() # use_bm25=True
 load_and_write_data(document_store)
 retriever = TfidfRetriever(document_store=document_store)
 reader = FARMReader(model_name_or_path="DeepPavlov/rubert-base-cased-sentence",
-                    use_gpu=False)
+                    use_gpu=False,
+                    num_processes=1)
 pipeline = ExtractiveQAPipeline(reader, retriever)