Complex sentence: His art teacher, a Mrs. Beagleman, was an impressionist and she continued as his mentor until the Albright school closed several years later, But nothing came to replace the Albright, and as a result Ross had no formal training.
Split into simpler sentences: His art teacher, a Mrs. Beagleman, was favored an Impressionist style of painting, and she continued as his mentor until the Albright school closed several years later. No institution was established to replace the Albright, and as a result Ross had no further formal training.