Detailed Instructions: You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
Problem:Context : One science fiction scholar points out that Planet of Exile, along with Rocannon's World and City of Illusions exhibits Le Guin's struggle as an emerging writer to arrive at a plausible, uniquely memorable and straightforward locale for her stories.
Subject : Planet of Exile
Relation : series
Solution:
What series is Planet of Exile part of?