In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Input: Consider Input: Passage: Population densities of mistletoebirds recorded around Australia vary from 0 to 2 birds per hectare with a mean of 0.35 birds per hectare (in areas unaffected by agriculture), where the largest concentration was found in the Kakadu National Park, Northern Territory. The longevity of a mistletoebird has been recorded in southern Queensland where a banded adult male was recaptured near the banding site after 9 years. Mistletoebirds vocally mimic other birds. Heard in all seasons and given by both sexes, they have been recorded mimicking the mulga parrot ( Psephotus varius) as well as more than 25 different species of passerines. Predators known to have taken mistletoebird nestlings are the grey shrike-thrush (Colluricincla harmonica), pied butcherbird (Cracticus nigrogularis), pied currawong (Strepera graculina) and the Australian raven (Corvus coronoides). Nests have also been parasitized by a number of cuckoo species including the horsfield bronze cuckoo (Chrysococcyx basalis) and the fan-tailed cuckoo (Cuculus pyrrhophanus).
 Link Information:  It covers an area of 19804 km2, extending nearly 200 kilometres from north to south and over 100 kilometres from east to west.  Question: What is the size of the park where the largest concentration of Mistletoebirds can be found?

Output: Answer: 19804 km2


Input: Consider Input: Passage: Despite the perceived improbability of landfall in the days preceding the storm's passage, the West Palm Beach chapter of the American Red Cross began preparing for the storm. Dr. William J. Buck, likely the only doctor between Pahokee and Moore Haven and also president of the Belle Glade town council and the founder of the town's American Legion post, was skeptical of the Weather Bureau's predictions of the storm missing South Florida. He and his legionnaires warned residents in the Lake Okeechobee region of the approaching cyclone. At South Bay, Frank Schuster made several car trips to save 211 people by transporting them to higher ground. The Seminoles at the Brighton Seminole Indian Reservation in Glades County evacuated to higher ground after observing retreating wildlife. Hours before the storm made landfall, many in the communities surrounding Lake Okeechobee either crowded into a house or evacuated to the building they believed was securest, such as the Belle Glade Hotel, the Glades Hotel, and Henry Martin's store in Belle Glade, with the Glades Hotel sheltering 20 people and the Belle Glade Hotel having nearly 150 refugees. About 500 people in Lake Worth were sheltered inside the Gulf Stream Hotel during the storm. In West Palm Beach, food and thousands of candles, kerosene lamps, and boards were sold on September 16. A number of residents boarded up their homes and then secured their ornamental trees and plants. At the building then being used as the Palm Beach County Courthouse, approximately 500 people sought shelter inside. In Jupiter, 20 people sought refuge in a grocery store, while 25 others stayed at a newly constructed elementary school. A number of African Americans took shelter in a school building in West Jupiter.
 Link Information: none Question: What was the population of Lake Okeechobee during this time?

Output: Answer: none


Input: Consider Input: Passage: Roaring Riva began his racing career by winning a maiden race over five furlongs at Windsor Racecourse and then followed up by taking a minor event over six furlongs at the same track. In early July he was sent to York Racecourse to contest the Black Duck Stakes and finished second, beaten half a length by Nomination, a colt who went on to beat Green Desert in the Richmond Stakes. The colt was then sent to Ireland and moved up in class for the Group 1 Phoenix Stakes over six furlongs on soft ground at Phoenix Park Racecourse. Ridden by Ray Cochrane he started the 4/1 second favourite behind the highly regarded, but previously unraced Tate Gallery, with the best-fancied of the other eleven runners being the unbeaten filly Sherkraine, Devil's Run and Mr John. Roaring Riva was among the leaders from the start, went to the front two furlongs out and held off the challenge of the filly So Directed to win by three quarters of a length. Laing recalled that it was "quite a day. We had private planes, champagne, the lot!"
 Link Information: The factors that go into determining race track condition include the surface conditions, type of surface, and track configuration. Question: How is the track condition determined before a race?


Output: Answer: surface conditions