Complex sentence: Murray was encouraged in her writing by one of her English instructors, who gave her an "A" for an essay about her maternal grandfather; this became the basis of her later memoir "Proud Shoes" (1956) about her mother's family.
Split into simpler sentences: Murray was encouraged in her writing by one of her English instructors, who gave her an "A" for an essay about her maternal grandfather. This became the basis of her later memoir "Proud Shoes" (1956) about her mother's family.