{
  "noteId": "al-del-contractions",
  "target_count": 30,
  "seed_count": 7,
  "generated_count": 23,
  "exercises": [
    {"sentence": "Yo voy _____ baño.", "correct": "al", "distractor": "a el", "explanation": "a + el always contracts to al."},
    {"sentence": "Vengo _____ mercado.", "correct": "del", "distractor": "de el", "explanation": "de + el always contracts to del."},
    {"sentence": "Quiero ir _____ clase.", "correct": "a la", "distractor": "al", "explanation": "Feminine la does not contract."},
    {"sentence": "Es el regalo _____ profesor.", "correct": "del", "distractor": "de la", "explanation": "Profesor is masculine, so de + el = del."},
    {"sentence": "El libro es _____ él.", "correct": "de", "distractor": "del", "explanation": "The pronoun él (with accent) does not contract; only the article el does."},
    {"sentence": "Vamos _____ playa.", "correct": "a la", "distractor": "al", "explanation": "Playa is feminine; no contraction."},
    {"sentence": "El presidente _____ Salvador habló.", "correct": "de El", "distractor": "del", "explanation": "Proper nouns with capital El don't contract."},
    {"sentence": "Vamos _____ parque.", "correct": "al", "distractor": "a el", "explanation": "a + el = al (mandatory contraction)."},
    {"sentence": "Salgo _____ trabajo a las cinco.", "correct": "del", "distractor": "de el", "explanation": "de + el = del (mandatory contraction)."},
    {"sentence": "Voy _____ los niños. (toward)", "correct": "a", "distractor": "al", "explanation": "Plural los does not contract; just 'a los niños'."},
    {"sentence": "Es la casa _____ los abuelos.", "correct": "de", "distractor": "del", "explanation": "Plural los does not contract; 'de los'."},
    {"sentence": "Hablo _____ doctor.", "correct": "del", "distractor": "de el", "explanation": "de + el = del."},
    {"sentence": "Llamo _____ médico.", "correct": "al", "distractor": "a el", "explanation": "a + el = al."},
    {"sentence": "La llave _____ coche está aquí.", "correct": "del", "distractor": "de el", "explanation": "de + el (coche, masc.) → del."},
    {"sentence": "Voy _____ universidad.", "correct": "a la", "distractor": "al", "explanation": "Universidad is feminine; no contraction."},
    {"sentence": "Vengo _____ tienda.", "correct": "de la", "distractor": "del", "explanation": "Tienda is feminine; de la, no contraction."},
    {"sentence": "Es el regalo _____ él.", "correct": "de", "distractor": "del", "explanation": "Pronoun él (accented) never contracts with de."},
    {"sentence": "El gato corre _____ él.", "correct": "a", "distractor": "al", "explanation": "Pronoun él never contracts with a."},
    {"sentence": "El presidente viaja _____ Salvador.", "correct": "a El", "distractor": "al", "explanation": "Proper noun El Salvador keeps capital El, no contraction."},
    {"sentence": "Camino _____ supermercado.", "correct": "al", "distractor": "a el", "explanation": "a + el = al."},
    {"sentence": "El plato _____ chef es famoso.", "correct": "del", "distractor": "de el", "explanation": "de + el = del."},
    {"sentence": "Voy _____ las tiendas.", "correct": "a", "distractor": "al", "explanation": "Plural feminine las → no contraction; 'a las'."},
    {"sentence": "Hablamos _____ las profesoras.", "correct": "de", "distractor": "del", "explanation": "Plural feminine; 'de las', no contraction."},
    {"sentence": "Es el sombrero _____ niño.", "correct": "del", "distractor": "de el", "explanation": "de + el (niño, masc.) → del."},
    {"sentence": "Doy comida _____ perro.", "correct": "al", "distractor": "a el", "explanation": "a + el = al."},
    {"sentence": "Las palabras _____ poema son hermosas.", "correct": "del", "distractor": "de el", "explanation": "de + el = del."},
    {"sentence": "Me acerco _____ ventana.", "correct": "a la", "distractor": "al", "explanation": "Ventana is feminine; no contraction."},
    {"sentence": "Las hojas _____ árbol caen.", "correct": "del", "distractor": "de el", "explanation": "de + el (árbol, masc.) → del."},
    {"sentence": "Llamo _____ ella mañana.", "correct": "a", "distractor": "al", "explanation": "Ella is a pronoun; no contraction."},
    {"sentence": "Voy _____ aeropuerto.", "correct": "al", "distractor": "a el", "explanation": "a + el = al."}
  ]
}