an Entity references as follows:
A professional technical school (Russian: профессиона́льно-техни́ческое учи́лище) – "professionalno-tehnicheskoye uchilishche" (acronym: PTU; ПТУ, пэ-тэ-у́) is a type of vocational education facility established in the former Soviet Union to train qualified industrial workers and servicemen. Such schools are widespread in all post-Soviet countries (usually in every city). PTUs formed a government-funded USSR-wide system for school graduates who didn't intend to receive a university degree.