diff --git a/demo/plate1n/data/sample-x219-y237-signal-Txx.csv b/demo/plate1n/data/sample-x219-y237-signal-Txx.csv
new file mode 100644
index 0000000..81715d2
--- /dev/null
+++ b/demo/plate1n/data/sample-x219-y237-signal-Txx.csv
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