TASK DEFINITION: In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
PROBLEM: Context: such as the Swiss band Hellhammer (later to become Celtic Frost) Link Information:  Formed in 1981 as Hellhammer, the band became Celtic Frost in 1984 Answer: 1984

SOLUTION: In what year did Hellhammer become Celtic Frost?

PROBLEM: Context: In addition to Shahrbanu, the historian Al-Masudi provides the names of four other children of Yazdegerd III; two sons, namely Peroz and Bahram Link Information: none Answer: none

SOLUTION: Which of the sons was born first?

PROBLEM: Context: The earliest significant archaeological find in the harbour is the Poole Logboat Link Information: he Iron Age vessel was unearthed in 1964  Answer: 1964 

SOLUTION:
What year was the Poole Logboat found by archaeologists?