diff --git a/.gitattributes b/.gitattributes
index da6b785727adcb4d368a748ef16bd127cacde2de..5432e43adf8ee5986e927a5fec561fed1ef2f9e0 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -66,3 +66,4 @@ data/AB/1917/04_correctedxml.tar.gz filter=lfs diff=lfs merge=lfs -text
 data/AB/1918/04_correctedxml.tar.gz filter=lfs diff=lfs merge=lfs -text
 data/AB/1919/04_correctedxml.tar.gz filter=lfs diff=lfs merge=lfs -text
 data/AB/1920/04_correctedxml.tar.gz filter=lfs diff=lfs merge=lfs -text
+data/AB/1921/04_correctedxml.tar.gz filter=lfs diff=lfs merge=lfs -text
diff --git a/.renku/workflow/1c007a21c7cc483d9d9bdbf33c1f0c8e_python.cwl b/.renku/workflow/1c007a21c7cc483d9d9bdbf33c1f0c8e_python.cwl
new file mode 100644
index 0000000000000000000000000000000000000000..898da491100ec697ccb6e4ea042e170517435efe
--- /dev/null
+++ b/.renku/workflow/1c007a21c7cc483d9d9bdbf33c1f0c8e_python.cwl
@@ -0,0 +1,51 @@
+arguments: []
+baseCommand:
+- python
+class: CommandLineTool
+cwlVersion: v1.0
+hints: []
+inputs:
+  input_1:
+    default:
+      class: File
+      path: ../../src/python/run_correctxml.py
+    inputBinding:
+      position: 1
+      separate: true
+      shellQuote: true
+    streamable: false
+    type: File
+  input_2:
+    default:
+      class: File
+      path: ../../data/AB/1921/02_extractedxml.tar.gz
+    inputBinding:
+      position: 2
+      separate: true
+      shellQuote: true
+    streamable: false
+    type: File
+  input_3:
+    default: data/AB/1921/04_correctedxml.tar.gz
+    inputBinding:
+      position: 3
+      separate: true
+      shellQuote: true
+    streamable: false
+    type: string
+outputs:
+  output_0:
+    outputBinding:
+      glob: $(inputs.input_3)
+    streamable: false
+    type: File
+permanentFailCodes: []
+requirements:
+- class: InlineJavascriptRequirement
+- class: InitialWorkDirRequirement
+  listing:
+  - entry: '$({"listing": [], "class": "Directory"})'
+    entryname: data/AB/1921
+    writable: true
+successCodes: []
+temporaryFailCodes: []
diff --git a/data/AB/1921/04_correctedxml.tar.gz b/data/AB/1921/04_correctedxml.tar.gz
new file mode 100644
index 0000000000000000000000000000000000000000..f9be17dfdb7de2af1e65be8584b5041937941757
--- /dev/null
+++ b/data/AB/1921/04_correctedxml.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e264b72ba14e7178c70b61fb4ff7b88e9f0cbcc4e3b4c6ce5afafc3b63891c92
+size 8579341