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.

Ex Input:
Context: The Conquest of Melilla occurred in September 1497, when a fleet sent by the Duke of Medina Sidonia seized the north African city of Melilla., as continuation of Reconquest of Mauritania Tingitana During the 15th century the mediterranean cities of the Sultanate of Fez fell in decadence in opposition to cities located in the Atlantic facade, which concentrated most of the economic activity. By the end of the 15th century, the port of Melilla, that had been often disputed between the rulers of Fez and Tlemcen, was nearly abandoned. Plans for the conquest occurred as soon as the Fall of Granada in 1492. Spanish captains Lezcano and Lorenzo Zafra visited the coast of Northern Africa to identify possible locations for the Spanish to overtake, and Melilla was identified as a prime candidate. Melilla was, however, in the Portuguese zone of influence under the terms of the 1479 Treaty of Alcacovaz. At Tordesillas in 1494, King John II of Portugal, the Portuguese ruler agreed to make an exception and permitted the Spanish to attempt the conquest of Melilla. The duke sent Pedro Estopinan who conquered the city virtually without a fight in 1497, as internal conflicts had depleted it of troops, and its defenses were weakened. The Wattasid ruler Muhammad al-Shaykh sent a detachment of cavalrymen to retake control of the city, but they were repulsed by the guns of the Spanish ships. 
 Question: Which happened first, the fleet being sent by the Duke of Medina, or the Conquest of Melilla?

Ex Output:
fleet sent by the duke


Ex Input:
Context: Asia has many wild places. The following national parks are among the most famous in Asia. People come to visit them from near and far in order to appreciate the unique qualities of the land and everything on it. Have you ever visited any of these Asian national parks? Jiuzhai Valley National Park, China The extraordinarily beautiful park is famous for its fascinating blue-green lakes, waterfalls and its unique wildlife. Located in the Minshan Mountain, Sichuan Province, it is a breathtaking park because of its scenery and it is also home to nine Tibetan villages, over 220 bird species as well as a number of endangered animals and plants, such as giant pandas, Sichuan golden monkeys and numerous _ . This park was also declared a UNESCO World Heritage Site in 1992. Khao Sok National Park, Thailand This extraordinary park is several miles away from Phuket , yet its remoteness prevents it from being visited. Even so, it is well worth a visit as scientists have noted that is rainforest stretches are not only longer than those of the Amazon, but also more divers . Animals like tigers, Asian elephants, and macaaues make their home here. Everyone who visits the park, however, seems to want to have a look at the amazing Rafflesia, one of the strangest flowering plants on earth; it smells like smelly meat when it blooms. Nikko National Park, Japan It is lovely to visit this park all the year round with its waterfalls and picturesque Lake Chuzenji. And it is especially worth visiting in autumn when the leaves change from green to deep red and orange. Set with UNESCO protected shrines and temples, the park is a unique mixture of natural and man-made attractions. With various routes perfect for adventurous hikers, a visit to the Nikko National Park is not to be missed. If you want to know more information about Asian famous national parks, you can log in [Link] If you want to enjoy all the above, welcome to call 050-24689120, and we can give a reasonable price. 
 Question: If you're an adventurous hiker, which park would you probably choose to visit?

Ex Output:
nikko national park.


Ex Input:
Context: Selexipag is a novel, oral, selective prostacyclin (PGI2) receptor agonist in clinical development for the treatment of pulmonary arterial hypertension. Film-coated tablets with strength between 200 and 1,600 g were used. Bioequivalence between 8 x 200 g and a new 1,600 g tablet was evaluated at steady state in healthy male subjects. This was an open-label, 2-treatment, 2-period, crossover, up-titration, phase 1 study. The treatments were selexipag at 1,600 g b.i.d. for 4.5 days either as 8 x 200 g tablets (reference: A) or 1 x 1,600 g tablet (test: B), both preceded by an up-titration phase starting from 400 g b.i.d. doses, in 200-g steps every 4th day. Subjects were randomized 1 : 1 to the A-B or B-A sequence. The pharmacokinetics and tolerability of selexipag and its active metabolite, ACT-333679, were investigated. 80 subjects were enrolled in the study: 65 subjects completed the study according to protocol, and 15 subjects withdrew from the study. The most frequent adverse events (AEs) were headache (86%), myalgia (73%), and jaw pain (73%). There was no difference in nature and overall frequency of AEs between the two treatments. Steady state was attained within 3 days of the selexipag 1,600 g b.i.d. The 90% confidence intervals (CIs) of the geometric mean ratio (B/A) at steady state for AUC and Cmax,ss were within (0.80, 1.25) bioequivalence interval: (0.92, 1.06) and (0.95, 1.14), respectively, for selexipag and (0.95, 1.06) and (0.94, 1.07), respectively, for the active metabolite, ACT-333679. Bioequivalence was demonstrated between 8 x 200 g and 1 x 1,600 g selexipag at steady state. 
 Question: Selexipag is used for which disease?

Ex Output:

pulmonary arterial hypertension