{
  "noteId": "articles-and-gender",
  "target_count": 30,
  "seed_count": 7,
  "generated_count": 23,
  "exercises": [
    {"sentence": "_____ libro está en la mesa.", "correct": "El", "distractor": "La", "explanation": "libro ends in -o → masculine → el."},
    {"sentence": "Voy a _____ piscina.", "correct": "la", "distractor": "el", "explanation": "piscina ends in -a → feminine → la."},
    {"sentence": "_____ problema es difícil.", "correct": "El", "distractor": "La", "explanation": "Greek-origin -ma noun → masculine: el problema."},
    {"sentence": "Tengo _____ libro nuevo.", "correct": "un", "distractor": "uno", "explanation": "Before a masculine noun use un, not uno."},
    {"sentence": "_____ ciudad es grande.", "correct": "La", "distractor": "El", "explanation": "Nouns ending in -d are usually feminine."},
    {"sentence": "Bebo _____ agua fría.", "correct": "el", "distractor": "la", "explanation": "agua takes el in the singular (stressed initial a-) even though it's feminine."},
    {"sentence": "Quiero ver _____ foto.", "correct": "la", "distractor": "el", "explanation": "foto is short for fotografía → feminine."},
    {"sentence": "Necesito _____ mapa de la ciudad.", "correct": "un", "distractor": "una", "explanation": "mapa is masculine despite ending in -a."},
    {"sentence": "_____ día es muy largo.", "correct": "El", "distractor": "La", "explanation": "día is masculine, an exception to the -a rule."},
    {"sentence": "Me duele _____ mano derecha.", "correct": "la", "distractor": "el", "explanation": "mano is feminine despite ending in -o."},
    {"sentence": "_____ moto es rápida.", "correct": "La", "distractor": "El", "explanation": "moto (← motocicleta) is feminine."},
    {"sentence": "Compré _____ flores para mi madre.", "correct": "unas", "distractor": "unos", "explanation": "flores is feminine plural → unas."},
    {"sentence": "_____ casas son blancas.", "correct": "Las", "distractor": "Los", "explanation": "casas is feminine plural → las."},
    {"sentence": "Quiero _____ manzana.", "correct": "una", "distractor": "un", "explanation": "manzana ends in -a → feminine → una."},
    {"sentence": "_____ universidad está cerca.", "correct": "La", "distractor": "El", "explanation": "Nouns ending in -d are usually feminine."},
    {"sentence": "_____ programa empieza a las ocho.", "correct": "El", "distractor": "La", "explanation": "Greek-origin -ma noun → masculine: el programa."},
    {"sentence": "Necesito _____ cuadernos para la clase.", "correct": "unos", "distractor": "unas", "explanation": "cuadernos is masculine plural → unos."},
    {"sentence": "_____ clase empieza a las nueve.", "correct": "La", "distractor": "El", "explanation": "clase is feminine despite ending in -e."},
    {"sentence": "_____ canción es muy bonita.", "correct": "La", "distractor": "El", "explanation": "Nouns ending in -ción are feminine."},
    {"sentence": "_____ niños juegan en el parque.", "correct": "Los", "distractor": "Las", "explanation": "niños is masculine plural → los."},
    {"sentence": "Compré _____ coche nuevo.", "correct": "un", "distractor": "una", "explanation": "coche is masculine → un."},
    {"sentence": "_____ acción de la película es increíble.", "correct": "La", "distractor": "El", "explanation": "Nouns ending in -ción are feminine."},
    {"sentence": "Vi _____ película interesante anoche.", "correct": "una", "distractor": "un", "explanation": "película is feminine → una."},
    {"sentence": "_____ carne está deliciosa.", "correct": "La", "distractor": "El", "explanation": "carne is feminine despite ending in -e."},
    {"sentence": "_____ hospitales están llenos.", "correct": "Los", "distractor": "Las", "explanation": "hospitales is masculine plural → los."},
    {"sentence": "Tengo _____ amiga en México.", "correct": "una", "distractor": "un", "explanation": "amiga is feminine → una."},
    {"sentence": "_____ mesa es de madera.", "correct": "La", "distractor": "El", "explanation": "mesa ends in -a → feminine → la."},
    {"sentence": "Necesito _____ paraguas.", "correct": "un", "distractor": "una", "explanation": "paraguas is masculine."},
    {"sentence": "_____ universidades son antiguas.", "correct": "Las", "distractor": "Los", "explanation": "universidades (-d) → feminine plural → las."},
    {"sentence": "Tengo _____ ideas buenas.", "correct": "unas", "distractor": "unos", "explanation": "ideas is feminine plural → unas."}
  ]
}