Instruct: Classify Amazon reviews into positive or negative sentiment
Query: this incribed piece of leather is a writing excercise.

The so called 4QTherapeia has nothing to do with medicine. "This is simply a writing excercise by a fairly skilled person, perhaps a scribe, who used a small left-over piece of leather in order to write some meaningless words and letters and thus to accustom his hand to the pen and ink and to the writing material before beginning to write in earnest. This is a common practice, both in antiquity and among modern graphic artists." For details see J. Naveh, "A Medical Document or a Writing Excercise? The So-called 4QTherapeia," Israel Exploration Journal 36 (1986), pp.52-55.