Q: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Passage: Lee had lost her mother, who suffered from mental illness, six years before she met Hohoff at Lippincott's offices. Her father, a lawyer on whom Atticus was modeled, would die two years after the publication of To Kill a Mockingbird. Question: What ailment did Harper Lee's mother suffer from?
A:
mental illness