Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Example input: Context: Architecturally, the school has a Catholic character. Atop the Main Building's gold dome is a golden statue of the Virgin Mary. Immediately in front of the Main Building and facing it, is a copper statue of Christ with arms upraised with the legend 'Venite Ad Me Omnes'. Next to the Main Building is the Basilica of the Sacred Heart. Immediately behind the basilica is the Grotto, a Marian place of prayer and reflection. It is a replica of the grotto at Lourdes, France where the Virgin Mary reputedly appeared to Saint Bernadette Soubirous in 1858. At the end of the main drive (and in a direct line that connects through 3 statues and the Gold Dome), is a simple, modern stone statue of Mary.
Question: To whom did the Virgin Mary allegedly appear in 1858 in Lourdes France?
Example output: Saint Bernadette Soubirous
Example explanation: This is the correct answer. Because the question is asking for the name of the person and following sentence from the passage answers it: It is a replica of the grotto at Lourdes, France where the Virgin Mary reputedly appeared to Saint Bernadette Soubirous in 1858.
Q: Context: Many ESL (English as a Second Language) students in the United States enroll in academic preparation programs and are in their late teens or early twenties. This is often a time when students are looking back on childhood in a different way. Their childhood memories and their viewpoint on those memories can be very useful for the production of wonderfully creative writing. For this project, the students began in class by closing their eyes and trying to return to their childhood years in order to bring early memories to their mind. After imagining for a few minutes, they began to tell each other what they remembered about those years and tried to describe a particular incident that stood out in their memories. That evening they wrote in their journals about the incident, embellishing the story as much as possible. The next day, they read the story to a different partner and got feedback . The partner's job was to: ask more questions to bring back the writer's memory; help the writer make sure that past tense verbs were used correctly, focusing on the difference between those things that were still true and needed present tense and those things that belonged specifically to the past. Two days later, students made necessary changes or additions and turned in a typed copy of their story. I then made my own comments about their work and asked them to revise their work. The third draft produced some very good work.
Question: What did the author ask his students to write about?
A:
their childhood memories.