instruction:
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.
question:
Context: Ripley's Believe It or Not! is the name of several documentary television series based on the newspaper feature. The first series aired on NBC from 1949 to 1950 Link Information: Palance made his Broadway debut in The Big Two in 1947 Answer: 2
answer:
How long had Jack Palance been in the public eye the year Ripley's first premiered on NBC?


question:
Context: sent them to Berg concentration camp. Link Information: The camp was planned to have a capacity of 3,000 prisoners but was never fully finished Answer: 500-600
answer:
How many people were sent to the Berg concentration camp?


question:
Context: Daxing was renamed Chang'an in year 618 when the Duke of Tang, Li Yuan, proclaimed himself the Emperor Gaozu of Tang. Chang'an during the Tang dynasty (618–907) Link Information: none Answer: none
answer:

How many emperors succeeded Emperor Gaozu during his dynasty?