The pilot subset consists of 245 completed tests, which were sampled to represent different levels of achievement with respect to age, school year, gender and text type, as illustrated in Table  In order to make the corpus easy to interpret for scholars in the humanities, that is, to provide a format that is easy to read and understand, we use the CoNLL-X 2 shared task format instead of an XML-based representation.
since we are interested in the morpho-syntactic annotation, we have used the CoNLL-U 3 representation developed for the universal dependency annotation with some minor adaptations in order to represent corrections of student writings as spelling and grammatical errors, which occur frequently in these types of texts.