Given the task definition, example input & output, solve the new input case.
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: 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?
Output: Saint Bernadette Soubirous
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.

New input case for you: Context: After the 2004 Asian tsunami disaster, four independent volunteers, with little money and no experience, race off to volunteer in tsunami ravaged Sri Lanka. They meet up by fate at the Colombo airport and form a volunteer team. They rent a van, fill it with supplies and start driving down the coast to see where they can help. They stumble into a tribal village called Peraliya, which has been destroyed by a forty foot wave. During the time the wave hit Peraliya, a train called "The Queen of the Sea" was passing by and was washed away killing over 2500 passengers and villagers. The Four volunteers set up a first aid station and found themselves in charge of running a refugee camp with over 3000 people. Their initial two week journey turns into a year long odyssey of heartbreak and hope as the villagers turn against them when donated tsunami relief money does not materialize. The volunteers concentrate on the bigger picture and break every rule in the 'Disaster Aid Books'.
Question: What kind of natural disater was ravaging Sri Lanka?
Output:
tsunami