TASK DEFINITION: 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'.
PROBLEM: 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?

SOLUTION: Answer: 2

PROBLEM: Context: Gemini 9A (officially Gemini IX-A) was a 1966 crewed spaceflight in NASA's Gemini program. Link Information: Conducted between projects Mercury and Apollo, Gemini started in 1961 and concluded in 1966 Question: How long was NASA's Gemini program active?

SOLUTION: Answer: 5

PROBLEM: Context: n 1986 he appeared as Florestan in Beethoven's Fidelio at the Metropolitan Opera, opposite Hildegard Behrens Link Information: 

Hildegard Behrens (9 February 1937 – 18 August 2009)  Question: What year was Schunk's co-star in Beethoven's Fidelio born?

SOLUTION:
Answer: 1937