{
  "noteId": "demonstrative-adjectives",
  "target_count": 30,
  "seed_count": 6,
  "generated_count": 24,
  "exercises": [
    {"sentence": "_____ libro es interesante. (this)", "correct": "Este", "distractor": "Esta", "explanation": "Libro is masculine singular → este."},
    {"sentence": "_____ casas son grandes. (these)", "correct": "Estas", "distractor": "Estos", "explanation": "Casas is feminine plural → estas."},
    {"sentence": "_____ cursos son difíciles. (those)", "correct": "Esos", "distractor": "Eses", "explanation": "Masculine plural of ese is esos, not 'eses'."},
    {"sentence": "¿Qué es _____? (this — unknown)", "correct": "esto", "distractor": "este", "explanation": "Use neuter esto when the thing's gender is unknown."},
    {"sentence": "_____ es para todos. (that — general)", "correct": "Eso", "distractor": "Ese", "explanation": "General/abstract → neuter eso."},
    {"sentence": "_____ mesa (that, f sg).", "correct": "Esa", "distractor": "Esta", "explanation": "Mesa is feminine singular and 'that' (near listener) is esa."},
    {"sentence": "_____ niño es mi hijo. (this)", "correct": "Este", "distractor": "Esto", "explanation": "Niño is masculine singular → este (not neuter)."},
    {"sentence": "_____ manzana está madura. (this)", "correct": "Esta", "distractor": "Este", "explanation": "Manzana is feminine singular → esta."},
    {"sentence": "_____ chicos juegan fútbol. (these)", "correct": "Estos", "distractor": "Estes", "explanation": "Masculine plural is estos, never 'estes'."},
    {"sentence": "_____ flores son bonitas. (those)", "correct": "Esas", "distractor": "Esos", "explanation": "Flores is feminine plural → esas."},
    {"sentence": "_____ montañas (those over there).", "correct": "Aquellas", "distractor": "Esas", "explanation": "Far from both speaker and listener → aquellas."},
    {"sentence": "_____ edificio es muy alto. (that over there)", "correct": "Aquel", "distractor": "Ese", "explanation": "Far distance, masculine singular → aquel."},
    {"sentence": "_____ mujer es mi tía. (that over there)", "correct": "Aquella", "distractor": "Aquel", "explanation": "Mujer is feminine singular → aquella."},
    {"sentence": "_____ árboles son viejos. (those over there)", "correct": "Aquellos", "distractor": "Aquellas", "explanation": "Árboles is masculine plural → aquellos."},
    {"sentence": "Me gusta _____ camisa. (this)", "correct": "esta", "distractor": "este", "explanation": "Camisa is feminine singular → esta."},
    {"sentence": "Quiero comprar _____ zapatos. (these)", "correct": "estos", "distractor": "estas", "explanation": "Zapatos is masculine plural → estos."},
    {"sentence": "_____ es mi problema. (this — abstract)", "correct": "Esto", "distractor": "Este", "explanation": "Abstract idea → neuter esto."},
    {"sentence": "No entiendo _____. (that — general)", "correct": "eso", "distractor": "ese", "explanation": "Refers to a vague idea → neuter eso."},
    {"sentence": "_____ profesora habla rápido. (that)", "correct": "Esa", "distractor": "Eso", "explanation": "Profesora is feminine singular → esa."},
    {"sentence": "Dame _____ pluma. (that)", "correct": "esa", "distractor": "ese", "explanation": "Pluma is feminine singular → esa."},
    {"sentence": "_____ coche es nuevo. (that)", "correct": "Ese", "distractor": "Esa", "explanation": "Coche is masculine singular → ese."},
    {"sentence": "_____ niñas cantan bien. (those)", "correct": "Esas", "distractor": "Esos", "explanation": "Niñas is feminine plural → esas."},
    {"sentence": "_____ días fueron felices. (those over there/long ago)", "correct": "Aquellos", "distractor": "Esos", "explanation": "Distant in time/space → aquellos."},
    {"sentence": "_____ tiempos eran difíciles. (those distant)", "correct": "Aquellos", "distractor": "Aquellas", "explanation": "Tiempos is masculine plural → aquellos."},
    {"sentence": "¿De quién es _____? (this — unidentified)", "correct": "esto", "distractor": "este", "explanation": "Unknown object → neuter esto."},
    {"sentence": "_____ idea no me gusta. (that)", "correct": "Esa", "distractor": "Ese", "explanation": "Idea is feminine singular → esa."},
    {"sentence": "_____ amigos viven aquí. (these)", "correct": "Estos", "distractor": "Estas", "explanation": "Amigos is masculine plural → estos."},
    {"sentence": "Lee _____ libros. (these)", "correct": "estos", "distractor": "estes", "explanation": "Plural of este is estos."},
    {"sentence": "_____ silla está rota. (this)", "correct": "Esta", "distractor": "Está", "explanation": "Demonstrative esta (no accent); está is the verb."},
    {"sentence": "_____ es increíble. (this — general)", "correct": "Esto", "distractor": "Este", "explanation": "Abstract/general statement → neuter esto."}
  ]
}