TY JOUR TI Online Language Education: Principles of Creating a Marked Corpus of Learners’ Mistakes KW corpus of errors KW learner corpora KW abstract KW tagging KW error detection KW English as a foreign language JO Virtual Communication and Social Networks AU Vinogradova, Y.S. AU Il'chenko, I.V. AU Shiryaeva, P.S. AU Gorina, M.S. PY 2024 IS 3 PB Kemerovo State University