instruction:
In this task, you're given a statement, 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'.
question:
Context: His debut at the Metropolitan Opera was in the title role of Lohengrin on January 1, 1890, and he also sang Loge, Siegmund, the title role of Tannhäuser, Tristan in Tristan und Isolde, and Siegfried in both Siegfried and Götterdämmerung at the Met. Link Information: none Question: Which of the operas that Vogl played at the Met had the longest run?
answer:
Answer: none


question:
Context: The broadnose sevengill shark (Notorynchus cepedianus) is known to prey on the crossback stingaree Link Information: It is recognizable because of its seven gill slits, while most shark species have five gill slits Question: What is the difference between the amount of gills the species known to prey on the crossback stingaree have compared to most shark species?
answer:
Answer: 2


question:
Context: He was instrumental in the purchase of large tracts of land in western New England from the Native Americans, such as modern-day Lenox and Alford, Massachusetts, by parlaying this reputation and experience. Link Information: none Question: How much was Alford purchased for?
answer:

Answer: none