{
  "total_records": 20000,
  "total_words": 3092,
  "generation_date": "2026-04-04T12:24:24.507373",
  "exercise_types": {
    "T1_direct_translation": 4912,
    "T2_sentence_completion_block": 10,
    "T3_situational_recall": 5070,
    "T5_sentence_production": 4949,
    "T4_reverse_translation": 5039,
    "review_block": 3,
    "MV_verb_module": 4,
    "MN_noun_module": 12,
    "MA_semantic_cluster": 1
  },
  "cefr_vocab_distribution": {
    "C2": 209,
    "B1": 759,
    "A2": 627,
    "B2": 1024,
    "C1": 224,
    "A1": 249
  },
  "cefr_records_distribution": {
    "A1": 1569,
    "A2": 4085,
    "B2": 6715,
    "B1": 4893,
    "C1": 1416,
    "C2": 1322
  },
  "pos_distribution": {
    "noun": 1741,
    "adj": 420,
    "num": 9,
    "det": 15,
    "verb": 531,
    "adv": 257,
    "adjective": 6,
    "pron": 27,
    "prep": 40,
    "part": 4,
    "conjunction": 6,
    "pronoun": 3,
    "conj": 19,
    "adverb": 5,
    "aux": 8,
    "number": 1
  },
  "stage_distribution": {
    "1": 4938,
    "2": 15058,
    "99": 3,
    "0": 1
  },
  "lexical_error_count": 6028,
  "grammar_error_count": 0,
  "error_rate": 0.3014,
  "total_messages": 80045,
  "avg_messages_per_record": 4.00225,
  "avg_user_messages": 1.00075,
  "max_user_messages": 7,
  "min_user_messages": 1
}