Complex sentence: She attended North Ealing Primary School and Ealing County School for Girls, she then trained as an actress at the Guildhall School of Music and Drama, after her father on her fifteenth birthday thought that an appropriate birthday gift would be acting lessons.
Split into simpler sentences: She attended North Ealing Primary School and Ealing County School for Girls. She then trained as an actress at the Guildhall School of Music and Drama, after her father on her fifteenth birthday thought that an appropriate birthday gift would be acting lessons.