diff --git a/data/very_dirty_iris.csv b/data/very_dirty_iris.csv
new file mode 100644
index 0000000..d964489
--- /dev/null
+++ b/data/very_dirty_iris.csv
@@ -0,0 +1,151 @@
+Sepal.Length,Sepal.Width,Petal.Length,Petal.Width,Species
+6.4,.,4.5,1.5,versicolor
+6.3,3.3,6,2.5,virginica
+6.2,NA,5.4,2.3,virginica
+5,3.4,1.6,0.4,setosa
+5.7,2.6,3.5,1,versicolor
+5.3,NA,NA,0.2,setosa
+6.4, ,5.3,NA,virginica
+5.9,3,5.1,1.8,virginica
+5.8, , ,1,versicolor
+4.8,3.1,1.6,0.2,setosa
+5,3.5,1.6,0.6,setosa
+6, ,5.1,1.6,versicolor
+6,3,4.8,NA,virginica
+6.8,2.8,4.8,1.4,versicolor
+NA,3.9,1.7,0.4,setosa
+5,-3,3.5,1,versicolor
+5.5,NA,4,1.3,versicolor
+4.7,.,1.3,0.2,setosa
+NA,4,NA,0.2,setosa
+5.6,NA,4.2,1.3,versicolor
+4.9,3.6,NA,0.1,setosa
+5.4,NA,4.5,1.5,versicolor
+6.2,2.8,NA,1.8,virginica
+6.7,3.3,5.7,2.5,virginica
+NA,3,5.9,2.1,virginica
+4.6,.,1.4,0.2,setosa
+4.9,3.1,1.5,0.1,setosa
+73,29,63,NA,virginica
+6.5,.,5.1,2,virginica
+NA,2.8,0.82,1.3,versicolor
+4.4,.,NA,0.2,setosa
+5.9,.,4.8,NA,versicolor
+5.7,2.8,4.5,1.3,versicolor
+6.2,2.9,NA,1.3,versicolor
+6.6,2.9,23,1.3,versicolor
+4.8,3,1.4,0.1,setosa
+6.5,3,5.5,1.8,virginica
+6.2,2.2,4.5,1.5,versicolor
+6.7,2.5,5.8,1.8,virginica
+5,3,1.6,0.2,setosa
+5,NA,1.2,0.2,setosa
+5.8, ,3.9,1.2,versicolor
+0,NA,1.3,0.4,setosa
+5.8, ,5.1,1.9,virginica
+5.5,4.2,1.4,0.2,setosa
+unknown,2.8,6.7,2,virginica
+5.7,NA,NA,0.4,setosa
+7,.,4.7,1.4,versicolor
+6.5,3,5.8,2.2,virginica
+6,3.4,4.5,1.6,versicolor
+5.5,2.6,4.4,1.2,versicolor
+4.9,3.1,NA,0.2,setosa
+5.2, ,3.9,1.4,versicolor
+4.8,3.4,1.6,0.2,setosa
+6.3,3.3,4.7,1.6,versicolor
+unknown,3.8,6.7,2.2,virginica
+5.1,3.8,1.5,0.3,setosa
+NA,2.9,4.5,1.5,versicolor
+6.4,2.8,5.6,NA,virginica
+6.4,2.8,5.6,2.1,virginica
+5,2.3,3.3,NA,versicolor
+7.4,2.8,6.1,1.9,virginica
+4.3,3,1.1,0.1,setosa
+5,3.3,1.4,0.2,setosa
+7.2,3,5.8,1.6,virginica
+6.3,2.5,4.9,1.5,versicolor
+5.1,2.5,NA,1.1,versicolor
+NA,.,5.7,2.3,virginica
+5.1,3.5,NA,NA,setosa
+5,3.5,1.3,0.3,setosa
+6.1,3,4.6,1.4,versicolor
+6.9,3.1,5.1,2.3,virginica
+5.1,3.5,1.4,0.3,setosa
+6.5,NA,4.6,1.5,versicolor
+5.6,2.8,4.9,2,virginica
+4.9,2.5,4.5,NA,virginica
+5.5,3.5,1.3,0.2,setosa
+7.6,3,6.6,2.1,virginica
+5.1,3.8,0,0.2,setosa
+7.9,3.8,6.4,2,virginica
+6.1,2.6,5.6,1.4,virginica
+5.4,3.4,1.7,0.2,setosa
+6.1,2.9,4.7,1.4,versicolor
+5.4,3.7,1.5,0.2,setosa
+6.7,3,5.2,2.3,virginica
+5.1,3.8,1.9,Inf,setosa
+6.4,2.9,4.3,1.3,versicolor
+5.7,2.9,4.2,1.3,versicolor
+4.4,2.9,1.4,0.2,setosa
+6.3,2.5,5,1.9,virginica
+7.2,.,6,1.8,virginica
+4.9,NA,3.3,1,versicolor
+5.2,3.4,1.4,0.2,setosa
+5.8, ,5.1,1.9,virginica
+6,2.2,5,1.5,virginica
+6.9,3.1,NA,1.5,versicolor
+5.5,2.3,4,1.3,versicolor
+6.7,NA,5,1.7,versicolor
+5.7,3,4.2,1.2,versicolor
+6.3,2.8,5.1,1.5,virginica
+5.4,3.4,1.5,0.4,setosa
+7.2,3.6,NA,2.5,virginica
+6.3, ,4.9,NA,virginica
+5.6,3, ,1.3,versicolor
+5.1,3.7,NA,0.4,setosa
+5.5,NA,0.925,1,versicolor
+6.5,3,5.2,2,virginica
+4.8,3,1.4,NA,setosa
+6.1,2.8,NA,1.3,versicolor
+4.6,3.4,1.4,0.3,setosa
+6.3,3.4,NA,2.4,virginica
+5,3.4,1.5,0.2,setosa
+5.1,3.4,1.5,0.2,setosa
+NA,3.3,5.7,2.1,virginica
+6.7,3.1,4.7,1.5,versicolor
+unknown,2.6,6.9,2.3,virginica
+6.3,NA,4.4,1.3,versicolor
+4.6,3.1,1.5,0.2,setosa
+NA,3,5.5,2.1,virginica
+NA,2.8,4.7,1.2,versicolor
+5.9,3,NA,1.5,versicolor
+4.5,2.3,1.3,0.3,setosa
+6.4,.,5.3,2.3,virginica
+5.2, ,1.5,0.1,setosa
+49,30,14,2,setosa
+5.6,2.9,3.6,1.3,versicolor
+6.8,.,5.9,2.3,virginica
+5.8,NA,5.1,2.4,virginica
+4.6,3.6,NA,0.2,setosa
+5.7,0,1.7,0.3,setosa
+5.6,2.5,3.9,1.1,versicolor
+6.7,3.1,4.4,1.4,versicolor
+4.8,NA,1.9,0.2,setosa
+5.1,3.3,1.7,0.5,setosa
+4.4,3,1.3,NA,setosa
+unknown,3,NA,2.3,virginica
+4.7,.,1.6,0.2,setosa
+NA,3,4.9,1.8,virginica
+6.9,3.1,5.4,2.1,virginica
+6,2.2,4,1,versicolor
+5,NA,1.4,0.2,setosa
+5.5,NA,3.8,1.1,versicolor
+6.6,3,4.4,1.4,versicolor
+6.3,2.9,5.6,1.8,virginica
+5.7,2.5,5,2,virginica
+6.7,3.1,5.6,2.4,virginica
+5.6,3,4.5,1.5,versicolor
+5.2,3.5,1.5,0.2,setosa
+6.4,3.1,NA,1.8,virginica
+5.8,2.6,4,NA,versicolor